Add support for custom agent skills via plugins (#2202)

* Add support for custom agent skills via plugins
Update Admin.systemPreferences to updated endpoint (legacy has deprecation notice

* lint

* dev build

* patch safeJson
patch label loading

* allow plugins with no config options

* lint

* catch invalid setupArgs in frontend

* update link to docs page for agent skills

* remove unneeded files

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Co-authored-by: shatfield4 <seanhatfield5@gmail.com>

.github/workflows/dev-build.yaml

@@ -6,7 +6,7 @@ concurrency:
 
 on:
   push:
-    branches: ['chrome-extension'] # put your current branch to create a build. Core team only.
+    branches: ['agent-skill-plugins'] # put your current branch to create a build. Core team only.
     paths-ignore:
       - '**.md'
       - 'cloud-deployments/*'