feat: add --skip-install as alias for --no-install

[ulises-jeremias]

Problem

Users coming from other scaffolding tools often type --skip-install. CPA already has --no-install; an alias reduces friction (parity with Create-Node-App).

Solution

Register --skip-install as an alias of --no-install in the Typer/Click CLI options. Document it in --help and TROUBLESHOOTING if needed.

Acceptance criteria

• --skip-install skips dependency install the same as --no-install
• Appears in --help
• Covered by a CLI smoke/unit test