* public-gh/master:
Drop lockfile from watcher change
Tighten plugin dev file watching
Fix plugin smoke example typecheck
Fix plugin dev watcher and migration snapshot
Clarify plugin authoring and external dev workflow
Expand kitchen sink plugin demos
fix: set AGENT_HOME env var for agent processes
Add kitchen sink plugin example
Simplify plugin runtime and cleanup lifecycle
Add plugin framework and settings UI
# Conflicts:
# packages/db/src/migrations/meta/0029_snapshot.json
# packages/db/src/migrations/meta/_journal.json
