feat(CLI Tool): Clean up output of Canvas Create

Bálint Klérirequested to merge
issue/canvas-3591610:3591610-create-clean-up into 1.x
  • Rename CLI prompts, docs, and internal context from app to project.
  • Improve setup and error output for template, install, Git init, and agent compatibility flows.
  • Add a note when agent setup is skipped in non-interactive mode.
  • Update supported agent definitions to match vercel-labs/skills v1.5.9.

Closes #3591610 (closed). Code is authored with an AI coding agent.

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