feature: temperature graph widget (WIP)

[ClementTsang]

Description

A description of the change, what it does, and why it was made. If relevant (such as any change that modifies the UI), please provide screenshots of the changes:

WIP - Initial implementation of a temperature graph widget.

Issue

If applicable, what issue does this address?

Closes: #1366

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

❌ Patch coverage is 0% with 13 lines in your changes missing coverage. Please review.
✅ Project coverage is 53.39%. Comparing base (0f878c4) to head (ad3c3cc).
⚠️ Report is 54 commits behind head on main.

Files with missing lines	Patch %	Lines
src/widgets/temperature_graph.rs	0.00%	13 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1733       +/-   ##
===========================================
+ Coverage   41.68%   53.39%   +11.70%     
===========================================
  Files         114      115        +1     
  Lines       15877    15890       +13     
===========================================
+ Hits         6619     8485     +1866     
+ Misses       9258     7405     -1853     

Flag	Coverage Δ
macos-14	36.98% <0.00%> (-0.04%)	⬇️
ubuntu-latest	55.64% <0.00%> (+12.29%)	⬆️
windows-2019	37.22% <0.00%> (-0.04%)	⬇️

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