Replace addons with conventional handles

Provide the single-loadout Scene API, SAB-backed meshes, cameras, materials, lights, workers, post effects, and tutorial playgrounds. Batch matching row growth so active GPU loadouts refresh once.

Amp-Thread-ID: https://ampcode.com/threads/T-01a01380-b478-77d0-84a0-102880a5c5ae
Co-authored-by: Heaust Azure <heaust.azure@gmail.com>

package-lock.json

@@ -15,34 +15,11 @@
         "vitepress": "^1.6.4"
       }
     },
-    "addons/default-pipelines": {
-      "name": "@yawn/default-pipelines",
-      "version": "0.1.0"
-    },
-    "addons/gltf-import": {
-      "name": "@yawn/gltf-import",
-      "version": "0.1.0"
-    },
-    "addons/mesh-handles": {
-      "name": "@yawn/mesh-handles",
-      "version": "0.1.0"
-    },
-    "addons/render-graph-ast": {
-      "name": "@yawn/render-graph-ast",
-      "version": "0.1.0"
-    },
-    "addons/render-graph-fxnode": {
-      "name": "@yawn/render-graph-fxnode",
+    "addons/handles": {
+      "name": "@yawn/handles",
       "version": "0.1.0",
       "dependencies": {
-        "@yawn/render-graph-ast": "0.1.0"
-      }
-    },
-    "addons/render-graph-js": {
-      "name": "@yawn/render-graph-js",
-      "version": "0.1.0",
-      "dependencies": {
-        "@yawn/render-graph-ast": "0.1.0"
+        "@yawn/core": "0.1.0"
       }
     },
     "core": {
@@ -1245,28 +1222,8 @@
       "resolved": "core",
       "link": true
     },
-    "node_modules/@yawn/default-pipelines": {
-      "resolved": "addons/default-pipelines",
-      "link": true
-    },
-    "node_modules/@yawn/gltf-import": {
-      "resolved": "addons/gltf-import",
-      "link": true
-    },
-    "node_modules/@yawn/mesh-handles": {
-      "resolved": "addons/mesh-handles",
-      "link": true
-    },
-    "node_modules/@yawn/render-graph-ast": {
-      "resolved": "addons/render-graph-ast",
-      "link": true
-    },
-    "node_modules/@yawn/render-graph-fxnode": {
-      "resolved": "addons/render-graph-fxnode",
-      "link": true
-    },
-    "node_modules/@yawn/render-graph-js": {
-      "resolved": "addons/render-graph-js",
+    "node_modules/@yawn/handles": {
+      "resolved": "addons/handles",
       "link": true
     },
     "node_modules/algoliasearch": {