CLI fix: build failure from missing tsup peer dependencies

[realproject7]

From E2E test #644 / agent-os #325

Bug

`npm run build` in the CLI package fails because `tsup` is missing peer dependencies (`joycon`, `bundle-require`).

Fix

Add missing peer deps to `packages/cli/package.json`:
```
npm install --save-dev joycon bundle-require
```

Or pin a `tsup` version that doesn't require them.

Branch

`task/663-cli-build-fix`

Self-Verification (T3)

• `cd packages/cli && npm run build` — succeeds without errors
• `npm run build` from root — succeeds
• Built CLI binary works: `node dist/index.cjs --help`