Add invisible symbols for editor that were not previously displayed

[reznichenkodev]

Issue #, if available:
When inserting characters, tabs and spaces break, therefore I experience difficulties when inserting HTML code, and it is also not safe since such characters are invisible.

Description of changes:
Added:
Word Joiner: https://symbl.cc/en/2060/
Function Application: https://symbl.cc/en/2061/
Invisible Times: https://symbl.cc/en/2062/
Invisible Separator: https://symbl.cc/en/2063/
Invisible Plus: https://symbl.cc/en/2064/
Inhibit Symmetric Swapping: https://symbl.cc/en/206A/
Activate Symmetric Swapping: https://symbl.cc/en/206B/
Inhibit Arabic Form Shaping: https://symbl.cc/en/206C/
Activate Arabic Form Shaping: https://symbl.cc/en/206D/
National Digit Shapes: https://symbl.cc/en/206E/
Nominal Digit Shapes: https://symbl.cc/en/206F/

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

Pull Request Checklist:

• No backwards incompatible changes were made to Ace's public interface which is defined through the main typings file (ace.d.ts) and its references:
  • https://github.com/ajaxorg/ace/blob/master/ace.d.ts
  • https://github.com/ajaxorg/ace/blob/master/ace-modes.d.ts
  • https://github.com/ajaxorg/ace/blob/master/ace-extensions.d.ts

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.01%. Comparing base (31cb7b5) to head (40b3b47).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5663   +/-   ##
=======================================
  Coverage   87.01%   87.01%           
=======================================
  Files         598      598           
  Lines       43665    43665           
  Branches     7205     7205           
=======================================
  Hits        37994    37994           
  Misses       5671     5671           

Flag	Coverage Δ
unittests	87.01% <100.00%> (ø)

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