Remove unnecessary `as any` casts on capability strings (now valid
PluginCapability members) and add company-membership guards to match
production behavior in plugin-host-services.ts.
Wire issue document list/get/upsert/delete operations through the
JSON-RPC protocol so plugins can manage issue documents with the same
capabilities available via the REST API.
Fixes#940
* 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
