feat: add theme management with light and dark modes

- Implemented a new composable `useTheme` for managing theme state.
- Added functions to read and write theme preference to local storage.
- Applied theme styles to the DOM based on user preference.
- Introduced a toggle function to switch between light and dark themes.

refactor: enhance copilot plugin functionality

- Improved request handling with sequence and document versioning.
- Refactored ghost text handling to improve clarity and efficiency.
- Updated markdown insertion logic to handle parsed content more robustly.
- Enhanced error handling and logging for better debugging.

style: update global styles for light and dark themes

- Defined CSS variables for light and dark themes to streamline styling.
- Improved overall styling consistency and responsiveness.
- Added transitions for smoother theme changes and interactions.

.build-check/assets/vendor-micromark-util-decode-numeric-character-reference-CNs1qBpV.js

@@ -0,0 +1 @@
+function n(r,_){const e=Number.parseInt(r,_);return e<9||e===11||e>13&&e<32||e>126&&e<160||e>55295&&e<57344||e>64975&&e<65008||(e&65535)===65535||(e&65535)===65534||e>1114111?"�":String.fromCodePoint(e)}export{n as d};