feat: add LexAI status bar and suggestion panel

- Implemented a status bar item for LexAI with dynamic status updates (ready, processing, notReady).
- Created a suggestion panel for displaying and interacting with AI-generated suggestions.
- Added functionality for accepting, regenerating, and discarding suggestions within the suggestion zone.
- Introduced configuration options for writing style, prompt patterns, personas, and formats.
- Integrated progress indicators for long-running tasks and improved user feedback.
- Established TypeScript configuration for the vscode package.

packages/vscode/.vscodeignore

@@ -0,0 +1,10 @@
+.vscode/**
+.vscode-test/**
+src/**
+node_modules/**
+esbuild.mjs
+tsconfig.json
+**/*.ts
+**/*.map
+.gitignore
+*.vsix