feat: cap docker-git container CPU and RAM by default

[skulidropek]

Summary

• add default CPU/RAM limit intent of 30% for docker-git projects
• keep percent intent in docker-git.json and resolve it to absolute compose limits per host
• support manual overrides via --cpu / --ram and keep compatibility aliases --cpus / --memory
• wire the new limit fields through CLI, TUI, API and API console

Verification

• pnpm -C packages/lib build
• pnpm -C packages/app typecheck
• pnpm -C packages/api build
• pnpm -C packages/app exec vitest run
• pnpm -C packages/lib exec vitest run --passWithNoTests

Closes #135