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-mdast-util-gfm-CSyuX27B.js

@@ -0,0 +1 @@
+import{g as r,a}from"./vendor-mdast-util-gfm-autolink-literal-BQrVEGHY.js";import{g as m,a as t}from"./vendor-mdast-util-gfm-footnote-C-csI7OF.js";import{g as n,a as g}from"./vendor-mdast-util-gfm-strikethrough-Cj9qKt6Q.js";import{g as f,a as k}from"./vendor-mdast-util-gfm-table-H6nfZhjH.js";import{g as s,a as e}from"./vendor-mdast-util-gfm-task-list-item-C4T7uo9p.js";function u(){return[r(),m(),n(),f(),s()]}function F(o){return{extensions:[a(),t(o),g(),k(o),e()]}}export{F as a,u as g};