Added implementation for copy, cut and paste

[RobertGrancsa]

Using the usual ctrl+c, ctrl+x, ctrl+v, you can copy, cut and paste the new lines.

• I implemented a character buffer that copies the line into every time you press copy or cut, and can paste it anywhere in the file
• I reused the implementation of duplicate, and now duplicate is just a combination of the copy and paste methods, so as to reduce the number of duplicate lines.
• I updated the README.md to reflect these changes.

Some other clippy issues were found, regarding some borrowing and some casting, which now should be solved.

This closes #22

Signed-off-by: Robert Grancsa robert.grancsa2002@gmail.com

[codecov]

Codecov Report

Base: 42.71% // Head: 42.15% // Decreases project coverage by -0.55% ⚠️

Coverage data is based on head (2169ab2) compared to base (4dd0962).
Patch coverage: 11.53% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #207      +/-   ##
==========================================
- Coverage   42.71%   42.15%   -0.56%     
==========================================
  Files          10       10              
  Lines         913      918       +5     
==========================================
- Hits          390      387       -3     
- Misses        523      531       +8     

Flag	Coverage Δ
x86_64-apple-darwin	42.15% <11.53%> (-0.56%)	⬇️
x86_64-unknown-linux-gnu	42.04% <11.53%> (-0.56%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/editor.rs	27.61% <11.53%> (-0.88%)	⬇️

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[ilai-deutel]

This is great, thank you so much for your contribution!

[ilai-deutel]

@all-contributors please add @RobertGrancsa for code

[allcontributors]

@ilai-deutel

I've put up a pull request to add @RobertGrancsa! 🎉

[ilai-deutel]

Thanks!