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

plugins/fleets/manifest.json

@@ -3,18 +3,26 @@
   "name": "Fleets",
   "version": "1.0.0",
   "description": "Group hosts into fleets by static membership or tag rules, and run commands, package actions, and file transfers across every member at once.",
-  "author": { "name": "Termix" },
+  "author": {
+    "name": "Termix"
+  },
   "license": "MIT",
   "repository": "https://github.com/Termix-SSH/Termix",
   "category": "Infrastructure",
   "icon": "Boxes",
-  "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": [
+    "hosts:read",
+    "credentials:use",
+    "ssh:connect",
+    "db:own",
+    "ui:surface"
+  ],
+  "backend": "backend/index.mjs",
+  "frontend": "frontend/index.mjs",
+  "locales": "locales",
+  "platforms": ["linux", "win32", "darwin"]
 }