Improve panel and search UI colors to match theme
Improve focus and hover states for search input and buttons
Highlight search matches with distinct info and selection styling
- Added CodeMirror editor for file content editing in FilesView.
- Introduced draft saving functionality with unsaved changes confirmation dialog.
- Implemented file writing API to persist changes to the filesystem.
- Enhanced language support for syntax highlighting based on file extensions.
- Updated UI components to support new editing features, including save and discard options.
- Refactored line selection logic for improved user experience on both desktop and mobile.
- Added new utility functions for language detection by file extension.
- Introduced a new theme for CodeMirror to align with the application's design.
