feat: code tools, editor, executor (#4632)

* feat: code tools, editor, executor

CodeEditor & Preview
- CodeEditor: CodeMirror 6
  - Switch to CodeEditor in the settings
  - Support edit&save with a accurate diff&lookup strategy
  - Use CodeEditor for editing MCP json configuration
- CodePreview: Original Shiki syntax highlighting
  - Implemented using a custom Shiki stream tokenizer
  - Remov code caching as it is incompatible with the current streaming code highlighting
  - Add a webworker for shiki
- Other preview components
  - Merge MermaidPopup and Mermaid to MermaidPreview, use local mermaidjs
  - Show mermaid syntax error message on demand
  - Rename PlantUML to PlantUmlPreview
- Rename SyntaxHighlighterProvider to CodeStyleProvider for clarity
- Both light and dark themes are preserved for convenience

CodeToolbar
- Top sticky toolbar provides quick tools (left) and core tools (right)
- Quick tools are hidden under the `More` button to avoid clutter, while core tools are always visible
- View&edit mode
  - Allow switching between preview and edit modes
  - Add a split view

Code execution
- Pyodide for executing Python scripts
- Add a webworker for Pyodide

* fix: migrate version and lint error

* refactor: use constants for defining tool specs

* refactor: add user-select, fix tool specs

* refactor: simplify some state changing

* fix: make sure editor tools registered after the editor is ready

---------

Co-authored-by: 自由的世界人 <3196812536@qq.com>

package.json

@@ -74,6 +74,9 @@
     "@strongtz/win32-arm64-msvc": "^0.4.7",
     "@tanstack/react-query": "^5.27.0",
     "@types/react-infinite-scroll-component": "^5.0.0",
+    "@uiw/codemirror-extensions-langs": "^4.23.12",
+    "@uiw/codemirror-themes-all": "^4.23.12",
+    "@uiw/react-codemirror": "^4.23.12",
     "archiver": "^7.0.1",
     "async-mutex": "^0.5.0",
     "color": "^5.0.0",
@@ -84,12 +87,14 @@
     "electron-updater": "6.6.4",
     "electron-window-state": "^5.0.3",
     "epub": "patch:epub@npm%3A1.3.0#~/.yarn/patches/epub-npm-1.3.0-8325494ffe.patch",
+    "fast-diff": "^1.3.0",
     "fast-xml-parser": "^5.2.0",
     "fetch-socks": "^1.3.2",
     "fs-extra": "^11.2.0",
     "got-scraping": "^4.1.1",
     "jsdom": "^26.0.0",
     "markdown-it": "^14.1.0",
+    "mermaid": "^11.6.0",
     "node-stream-zip": "^1.15.0",
     "officeparser": "^4.1.1",
     "os-proxy-config": "^1.1.2",
@@ -145,6 +150,7 @@
     "@vitejs/plugin-react-swc": "^3.9.0",
     "@vitest/coverage-v8": "^3.1.1",
     "@vitest/ui": "^3.1.1",
+    "@vitest/web-worker": "^3.1.3",
     "@xyflow/react": "^12.4.4",
     "antd": "^5.22.5",
     "applescript": "^1.0.0",