chore: prepare v2.1.0 release

[callinmullaney]

Summary

Prepares the Emulsify CLI v2.1.0 minor release by merging the completed develop branch into main.

Highlights

• Safer system latest-tag lookup that avoids mutating user Git repositories.
• Deduplicated built-in system registration.
• Pull request CI validation for build, typecheck, tests, and package dry-run.
• Updated CLI documentation for current commands, starter repositories, component creation, non-interactive usage, and template overrides.
• Safer project path handling for generated/copied files.
• Safer hook script execution.
• Clearer component dependency graph errors.
• Clearer malformed JSON/config errors.
• Dry-run support for component create/install operations, if included.
• Dependency and package metadata cleanup.

Validation

• npm ci
• npm run build
• npm run type
• npm test
• npm pack --dry-run
• README reviewed
• Website docs handoff reviewed
• Release workflow reviewed

Release behavior

Merging this PR into main should trigger the publish workflow. The publish workflow should build the package and run semantic-release. Do not manually publish this release unless the automated workflow fails and maintainers decide to intervene.

Commit strategy:

• Prefer no code changes on this branch.
• If no files change, do not create an empty commit.
• If package metadata or release docs must change:
  1. chore(release): prepare v2.1.0
• Keep this branch release-only.

Do not push.
At the end, show:

• current branch
• git status --short
• git log --oneline main..HEAD
• validation results
• whether a commit was created
• suggested push command:
  git push -u origin release/v2.1.0
• suggested PR title and body

[github-actions]

🎉 This PR is included in version 2.1.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀