Added keyword and operator colors and matching bracket validator to cli

[HalidOdat]

This Pull Request fixes/closes #341 .

It changes the following:

• Made readline "> " to ">> ", looks much nicer ;)
• Added color to keywords (bold yellow)
• Added color to reserved words (true, false, Infinity) purple color
• Added color to undefined gray
• Added matching bracket validation (the cli will wait untill closing }, ), ]) so we can do something like:

function x() {
let y = 3;
}

Example: some dummy code:

The line 5 undefined is not colored because it is not part of the line that is being read, its output from forward_val

BTW: we can change the colors at any time :)

[codecov]

Codecov Report

Merging #590 into master will decrease coverage by 0.08%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #590      +/-   ##
==========================================
- Coverage   71.13%   71.04%   -0.09%     
==========================================
  Files         177      177              
  Lines       11425    11439      +14     
==========================================
  Hits         8127     8127              
- Misses       3298     3312      +14     

Impacted Files	Coverage Δ
boa_cli/src/main.rs	5.88% <0.00%> (-27.46%)	⬇️

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[github-actions]

Benchmark for 1b9975e

Click to view benchmark

Test	PR Benchmark	Master Benchmark	%
Arithmetic operations (Execution)	346.1±28.38ns	357.9±16.65ns	-3.30%
Arithmetic operations (Full)	156.4±7.02µs	163.0±9.04µs	-4.05%
Array access (Execution)	13.4±0.70µs	12.6±0.83µs	+6.35%
Array access (Full)	182.6±6.97µs	180.9±10.09µs	+0.94%
Array creation (Execution)	3.6±0.13ms	3.7±0.12ms	-2.70%
Array creation (Full)	3.9±0.14ms	4.0±0.15ms	-2.50%
Array pop (Execution)	1385.7±68.43µs	1418.1±92.04µs	-2.28%
Array pop (Full)	1680.1±108.69µs	1726.4±64.14µs	-2.68%
Boolean Object Access (Execution)	4.3±0.23µs	4.0±0.16µs	+7.50%
Boolean Object Access (Full)	169.7±8.21µs	166.3±7.52µs	+2.04%
Create Realm	155.0±4.95µs	143.8±11.62µs	+7.79%
Dynamic Object Property Access (Execution)	6.4±0.40µs	6.2±0.26µs	+3.23%
Dynamic Object Property Access (Full)	166.9±8.26µs	166.3±7.21µs	+0.36%
Expression (Lexer)	2.2±0.12µs	2.2±0.09µs	0.00%
Expression (Parser)	5.0±0.34µs	5.2±0.30µs	-3.85%
Fibonacci (Execution)	934.4±35.48µs	884.6±46.46µs	+5.63%
Fibonacci (Full)	1101.0±71.99µs	1117.4±57.32µs	-1.47%
For loop (Execution)	21.4±1.31µs	20.7±1.03µs	+3.38%
For loop (Full)	185.4±9.00µs	182.7±7.61µs	+1.48%
For loop (Lexer)	4.8±0.26µs	5.0±0.28µs	-4.00%
For loop (Parser)	13.4±1.16µs	13.4±0.65µs	0.00%
Goal Symbols (Parser)	7.9±0.43µs	8.2±0.34µs	-3.66%
Hello World (Lexer)	754.2±43.22ns	779.3±26.90ns	-3.22%
Hello World (Parser)	2.1±0.09µs	2.1±0.10µs	0.00%
Long file (Parser)	5.9±0.21ms	6.0±0.23ms	-1.67%
Number Object Access (Execution)	3.2±0.21µs	3.1±0.16µs	+3.23%
Number Object Access (Full)	160.3±8.00µs	162.5±8.19µs	-1.35%
Object Creation (Execution)	5.3±0.32µs	5.5±0.22µs	-3.64%
Object Creation (Full)	189.1±8.82µs	190.0±7.82µs	-0.47%
RegExp (Execution)	63.1±6.19µs	63.5±2.81µs	-0.63%
RegExp (Full)	233.4±10.84µs	243.2±9.83µs	-4.03%
RegExp Literal (Execution)	69.3±4.00µs	66.6±4.28µs	+4.05%
RegExp Literal (Full)	234.2±14.54µs	242.8±10.90µs	-3.54%
RegExp Literal Creation (Execution)	62.5±3.50µs	62.8±4.15µs	-0.48%
RegExp Literal Creation (Full)	283.7±14.75µs	285.8±11.44µs	-0.73%
Static Object Property Access (Execution)	5.7±0.31µs	5.4±0.24µs	+5.56%
Static Object Property Access (Full)	162.8±11.20µs	173.2±7.84µs	-6.00%
String Object Access (Execution)	7.9±0.43µs	7.6±0.33µs	+3.95%
String Object Access (Full)	169.2±10.74µs	169.8±6.54µs	-0.35%
String comparison (Execution)	6.2±0.32µs	6.3±0.28µs	-1.59%
String comparison (Full)	172.6±8.71µs	170.4±7.07µs	+1.29%
String concatenation (Execution)	5.2±0.40µs	5.1±0.26µs	+1.96%
String concatenation (Full)	167.4±6.37µs	162.6±7.50µs	+2.95%
String copy (Execution)	4.3±0.19µs	4.0±0.14µs	+7.50%
String copy (Full)	157.2±8.91µs	161.4±6.63µs	-2.60%
Symbols (Execution)	3.5±0.21µs	3.4±0.25µs	+2.94%
Symbols (Full)	157.1±8.08µs	155.0±7.59µs	+1.35%

[github-actions]

Benchmark for 6bfe7eb

Click to view benchmark

Test	PR Benchmark	Master Benchmark	%
Arithmetic operations (Execution)	383.8±4.92ns	406.5±18.89ns	-5.58%
Arithmetic operations (Full)	168.2±2.88µs	181.2±12.76µs	-7.17%
Array access (Execution)	14.0±0.42µs	14.8±0.51µs	-5.41%
Array access (Full)	192.9±7.08µs	192.6±11.96µs	+0.16%
Array creation (Execution)	3.9±0.09ms	4.1±0.21ms	-4.88%
Array creation (Full)	4.2±0.10ms	4.7±0.47ms	-10.64%
Array pop (Execution)	1612.8±90.44µs	1519.3±27.39µs	+6.15%
Array pop (Full)	1825.7±56.07µs	2.0±0.17ms	-8.72%
Boolean Object Access (Execution)	4.3±0.13µs	4.4±0.27µs	-2.27%
Boolean Object Access (Full)	182.0±3.93µs	207.8±52.88µs	-12.42%
Create Realm	155.8±1.86µs	167.9±6.79µs	-7.21%
Dynamic Object Property Access (Execution)	7.2±0.41µs	7.2±0.25µs	0.00%
Dynamic Object Property Access (Full)	188.0±12.61µs	202.0±28.28µs	-6.93%
Expression (Lexer)	2.4±0.05µs	2.5±0.34µs	-4.00%
Expression (Parser)	5.5±0.15µs	5.9±0.52µs	-6.78%
Fibonacci (Execution)	999.5±25.48µs	1181.7±173.26µs	-15.42%
Fibonacci (Full)	1198.0±23.14µs	1309.3±184.59µs	-8.50%
For loop (Execution)	23.0±0.38µs	23.7±0.86µs	-2.95%
For loop (Full)	195.8±4.34µs	200.8±16.83µs	-2.49%
For loop (Lexer)	5.2±0.08µs	5.4±0.40µs	-3.70%
For loop (Parser)	14.1±0.28µs	14.8±0.87µs	-4.73%
Goal Symbols (Parser)	8.6±0.19µs	8.7±0.21µs	-1.15%
Hello World (Lexer)	826.4±11.06ns	874.7±60.97ns	-5.52%
Hello World (Parser)	2.2±0.04µs	2.3±0.37µs	-4.35%
Long file (Parser)	6.4±0.10ms	6.6±0.22ms	-3.03%
Number Object Access (Execution)	3.4±0.07µs	3.7±0.34µs	-8.11%
Number Object Access (Full)	179.1±4.92µs	203.7±34.09µs	-12.08%
Object Creation (Execution)	6.1±0.52µs	6.2±0.38µs	-1.61%
Object Creation (Full)	204.9±8.97µs	225.2±19.73µs	-9.01%
RegExp (Execution)	68.6±2.01µs	69.7±1.90µs	-1.58%
RegExp (Full)	265.7±13.59µs	291.6±36.74µs	-8.88%
RegExp Literal (Execution)	72.0±1.99µs	73.9±2.02µs	-2.57%
RegExp Literal (Full)	269.5±16.39µs	290.5±34.69µs	-7.23%
RegExp Literal Creation (Execution)	72.3±6.51µs	70.5±2.55µs	+2.55%
RegExp Literal Creation (Full)	328.7±27.14µs	335.1±29.95µs	-1.91%
Static Object Property Access (Execution)	5.9±0.26µs	6.3±0.16µs	-6.35%
Static Object Property Access (Full)	183.8±5.09µs	203.8±27.21µs	-9.81%
String Object Access (Execution)	8.2±0.13µs	8.9±0.72µs	-7.87%
String Object Access (Full)	188.3±12.79µs	200.1±15.38µs	-5.90%
String comparison (Execution)	6.7±0.14µs	7.0±0.36µs	-4.29%
String comparison (Full)	183.9±10.53µs	209.0±21.03µs	-12.01%
String concatenation (Execution)	5.5±0.11µs	5.9±0.14µs	-6.78%
String concatenation (Full)	178.1±2.49µs	197.3±25.27µs	-9.73%
String copy (Execution)	4.2±0.03µs	4.8±0.67µs	-12.50%
String copy (Full)	174.5±3.35µs	186.9±18.18µs	-6.63%
Symbols (Execution)	3.7±0.09µs	4.2±0.31µs	-11.90%
Symbols (Full)	169.5±7.46µs	172.8±15.52µs	-1.91%