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

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

[codecov[bot]]

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 :warning:

Additional details and impacted files

```diff @@ 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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