feat(cli): add initial CLI implementation with argument parsing and prompt handling

- Created package.json and package-lock.json for CLI package.
- Implemented argument parsing in args.ts to handle various flags and commands.
- Developed main CLI logic in cli.ts to execute commands and handle errors.
- Added configuration loading from a JSON file in config.ts, with environment variable support.
- Implemented prompt resolution and provider interaction in prompt.ts.
- Added usage documentation for the CLI.
- Configured TypeScript settings in tsconfig.json for the CLI package.
- Updated README in vscode package to reflect the new CLI functionality.
- Refactored root tsconfig.json to streamline project structure.

.gitea/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,48 @@
+---
+name: Bug report
+about: Report a problem with LexAI (Chrome, VS Code, or CLI)
+title: "[bug] "
+labels: bug
+---
+
+## Summary
+
+A clear, one-sentence description of the bug.
+
+## Package
+
+Which LexAI surface is affected?
+
+- [ ] Chrome extension (`packages/chrome`)
+- [ ] VS Code / Cursor extension (`packages/vscode`)
+- [ ] CLI Prompt Builder (`packages/cli`)
+- [ ] Shared library (`src/lib`) / unclear
+
+## Environment
+
+- LexAI version / commit (if known):
+- OS:
+- Browser / VS Code / Cursor version (if relevant):
+- Provider + model (no API keys):
+
+## Steps to reproduce
+
+1.
+2.
+3.
+
+## Expected behavior
+
+What you expected to happen.
+
+## Actual behavior
+
+What happened instead. Include error messages (redact secrets).
+
+## Screenshots / logs
+
+Attach if helpful. **Never paste API keys or encrypted key material.**
+
+## Additional context
+
+Anything else that might help (page type, selection size, offline, etc.).