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-clsx-B-dksMZM.js

@@ -0,0 +1 @@
+function a(r){var f,n,t="";if(typeof r=="string"||typeof r=="number")t+=r;else if(typeof r=="object")if(Array.isArray(r)){var o=r.length;for(f=0;f<o;f++)r[f]&&(n=a(r[f]))&&(t&&(t+=" "),t+=n)}else for(n in r)r[n]&&(t&&(t+=" "),t+=n);return t}function i(){for(var r,f,n=0,t="",o=arguments.length;n<o;n++)(r=arguments[n])&&(f=a(r))&&(t&&(t+=" "),t+=f);return t}export{i as c};