feat: Enhance Filament Docs with CommonMark extensions and configuration options
- Added configuration options for CommonMark extensions in
filament-docs.php.
- Implemented dynamic loading of extensions in
DocsPage.php based on configuration.
- Introduced methods for handling supported file extensions and checking file types.
- Updated search functionality to allow for configurable maximum results per section.
- Created example documentation page to demonstrate usage of the new features.
- Added comprehensive README in examples directory detailing setup and available extensions.
- Included sample markdown file showcasing all available CommonMark extensions and their effects.