Add option to set a position of legend

[lyuha]

Description

Add options and args to change a position of time_chart's legend.

Issue

Related issues: #1125

Testing

If relevant, please state how this was tested. All changes must be tested to work:

If this is a code change, please also indicate which platforms were tested:

• Windows
• macOS
• Linux

Checklist

If relevant, ensure the following have been met:

• Areas your change affects have been linted using rustfmt (cargo fmt)
• The change has been tested and doesn't appear to cause any unintended breakage
• Documentation has been added/updated if needed (README.md, help menu, doc pages, etc.)
• The pull request passes the provided CI pipeline
• There are no merge conflicts
• If relevant, new tests were added (don't worry too much about coverage)

[codecov]

Codecov Report

Attention: Patch coverage is 71.11111% with 26 lines in your changes are missing coverage. Please review.

Project coverage is 55.90%. Comparing base (2ee0df1) to head (6b76883).

Files	Patch %	Lines
src/options.rs	58.82%	14 Missing ⚠️
src/canvas/components/tui_widget/time_chart.rs	0.00%	12 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1430      +/-   ##
==========================================
+ Coverage   55.84%   55.90%   +0.05%     
==========================================
  Files          97       97              
  Lines       18183    18271      +88     
==========================================
+ Hits        10154    10214      +60     
- Misses       8029     8057      +28     

Flag	Coverage Δ
macos-12	39.29% <66.66%> (+0.13%)	⬆️
ubuntu-latest	58.49% <71.11%> (+0.04%)	⬆️
windows-2019	39.47% <66.66%> (+0.14%)	⬆️

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[ClementTsang]

Sorry for taking so long - generally looks fine, left some small things to change/look at but otherwise should be good. Thanks for the PR!

[lyuha]

I apply suggentions and rebase to one commit.

[lyuha]

Could you rerun CI? I don't know why CI failed on macOS tests.

[ClementTsang]

Seems like it timed out for some reason.

Also sorry for the delay, I'll take a look at the changes in a bit.

[ClementTsang]

Made some small changes but otherwise looks good - thanks again for doing this!

@all-contributors please add @lyuha for code, docs

[allcontributors]

@ClementTsang

I couldn't determine any contributions to add, did you specify any contributions?
Please make sure to use valid contribution names.

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