Publish the CLI from its local package path

[Mathieu2301]

What

• make the CLI release path explicitly local (./packages/cli)
• bump the unpublished CLI release to 4.0.0-alpha.2

Root cause

npm publish packages/cli was parsed as a Git package reference and tried github.com/packages/cli.

Proof

• bun run check: 310 tests plus all smoke and contract checks
• npm pack ./packages/cli --dry-run --json: @miakapp/cli@4.0.0-alpha.2, 65 files