feat: collapse plugin runtime to one tier behind a plugin SDK

plugins/workspaces/manifest.json

@@ -3,18 +3,20 @@
   "name": "Workspaces",
   "version": "1.0.0",
   "description": "Save and restore named tab/split layouts per user.",
-  "author": { "name": "Termix" },
+  "author": {
+    "name": "Termix"
+  },
   "license": "MIT",
   "repository": "https://github.com/Termix-SSH/Termix",
   "category": "Productivity",
   "icon": "LayoutTemplate",
-  "engine": { "termix": ">=2.9.0", "api": "1" },
-  "capabilities": {
-    "backend": true,
-    "frontend": true,
-    "electron": true,
-    "platforms": ["linux", "win32", "darwin"]
+  "engine": {
+    "termix": ">=2.9.0",
+    "api": "1"
   },
-  "permissions": ["process:transport-owner"],
-  "sidecars": []
+  "capabilities": ["db:own", "ui:surface"],
+  "backend": "backend/index.mjs",
+  "frontend": "frontend/index.mjs",
+  "locales": "locales",
+  "platforms": ["linux", "win32", "darwin"]
 }