feat(components): add theme provider component

[desmondinho]

Description

Add theme provider component to the library of components.

Closes #7

What's been done?

Added theme provider component with the following abilities:

• Light and dark themes customization
• Set the default theme

Added theme related stuff:

• Colors palette (e.g., blue, pink, green)
• Semantic colors (e.g., background, foreground, primary, danger)
• Layout theme configuration (e.g., typography, hover opacity)
• Light and dark theme colors
• Light and dark theme configs

Checklist

• My code follows the project's coding style and guidelines.
• I have included inline docs for my changes, where applicable.
• I have added, updated or removed tests according to my changes.
• All tests are passing.
• There's an open issue for the PR that I am making.

[codecov]

Codecov Report

Attention: Patch coverage is 99.58932% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 83.36%. Comparing base (af579d7) to head (7adb661).
Report is 1 commits behind head on main.

Files	Patch %	Lines
...I/Components/Providers/LumexThemeProvider.razor.cs	95.65%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main       #8       +/-   ##
===========================================
+ Coverage   49.05%   83.36%   +34.31%     
===========================================
  Files          14       25       +11     
  Lines         210      649      +439     
  Branches       43       61       +18     
===========================================
+ Hits          103      541      +438     
  Misses        105      105               
- Partials        2        3        +1     

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