Set up Cursor Cloud dev environment - #1

What

Sets up the development environment for this Angular CLI (angular-cli v1.0.0-beta.24) monorepo so future Cloud Agents can lint, test, build, and run the ng CLI.

This PR only adds AGENTS.md; the rest of the setup is captured in the environment update script (no source code changes).

Environment

• Node 6.9.5 via nvm (not 6.17.x — [email protected]'s fs-6.3.0 shim crashes the test runner on newer 6.x). Login shell defaults to it.
• Dependencies installed with yarn under Node 6.9.5 (npm 3 hits an ENOTDIR staging bug on this filesystem).
• Update script: yarn install --pure-lockfile --ignore-optional --ignore-engines --non-interactive (after nvm use 6.9.5).

Verification

• npm run lint — passes (eslint + tslint)
• npm run build — passes (publish build → dist/)
• npm test — 123 CLI specs pass + package specs + dep validation
• Hello-world: ng new hello-world scaffolds an app and ng generate component my-widget creates the component and wires it into app.module.ts

angular_cli_demo.log

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