docs: add README.md

Author: pyadav

README.md

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+![Missing Studio CLI](assets/mstudio.png)
+
+Missing Studio's AI assistant for interacting with Model Context Protocol (MCP) servers. It provides a friendly, interactive terminal UI to get started quickly.
+
+- Node.js: >= 18
+- Binaries: `missingstudio` (primary), `mstudio` (alias)
+
+## Install
+
+- npm: `npm i -g @missingstudio/cli`
+- pnpm: `pnpm add -g @missingstudio/cli`
+- yarn: `yarn global add @missingstudio/cli`
+
+## Usage
+
+Run without arguments to launch the interactive UI:
+
+```bash
+mstudio
+```
+
+Common options:
+
+- `-V, --version`: Output the version number
+- `-h, --help`: Show help information
+- `-v, --verbose`: Enable verbose logging
+
+You can also invoke via the alias:
+
+```bash
+missingstudio OR
+npx @missingstudio/cli
+```
+
+## Development
+
+- Install deps: `npm install`
+- Start in dev (watch): `npm run dev`
+- Build: `npm run build`
+- Start from build: `npm start`
+- Typecheck: `npm run typecheck`
+- Tests: `npm test` (watch: `npm run test:watch`)
+- Lint/format: `npm run format` (fix: `npm run format:fix`)
+
+## Links
+
+- Website: https://www.missing.studio
+- Repository: https://github.com/missingstudio/cli
+- Issues: https://github.com/missingstudio/cli/issues
+
+## Changelog
+
+See `CHANGELOG.md` for release history.
+
+## License
+
+MIT © Missing Studio. See `LICENSE` for details.