fix(map-editor): v0.2.0b.1 — bind blob_rect_stone material so Auto-Tile renders

work.map.json was still schema-v2 with the legacy fa_terrain_v1
atlas — neither has a `material` field on its layers, so the
renderer's vertex/blob path never fired and Auto-Tile painting had
no visible effect (the set_vertex writes landed but the renderer
fell back to the cell-tile path that doesn't consume them).

Migration:
 - schema_version 2 -> 3
 - size 4x4 -> 16x16 (room to paint)
 - atlases: fa_terrain_v1 -> blob_rect_stone (S-V2E2-RM-Blob 14-slot
   atlas from lib-asset.prototype-blob-geom)
 - layers: surface + wall, both with "material": "blob_rect_stone";
   vertices+overrides start empty (lib-core.maps lazy-allocates on
   first set_vertex)

Manifest:
 - asset_aliases: fa_terrain_v1 -> blob_rect_stone (lib-asset.
   prototype-blob-geom)
 - deps: drop prototype-fa-starter, add prototype-blob-geom 0.1.0

manifest.module

@@ -1,18 +1,18 @@
 {
     "id": "map-editor",
-    "version": "0.2.0b",
+    "version": "0.2.0b.1",
     "kind": "module",
     "api": "^0.1",
     "ci_frames": 30,
     "entry_point": "init.lua",
     "asset_aliases": {
-        "fa_terrain_v1": "lib-asset.prototype-fa-starter"
+        "blob_rect_stone": "lib-asset.prototype-blob-geom"
     },
     "deps": [
         {"id":"lib-core.maps","version":"0.5.2"},
         {"id":"lib-core.render","version":"0.1.0"},
         {"id":"lib-core.camera","version":"0.3.0"},
         {"id":"lib-core.input","version":"0.4.0"},
-        {"id":"lib-asset.prototype-fa-starter","version":"0.2.0"}
+        {"id":"lib-asset.prototype-blob-geom","version":"0.1.0"}
     ]
 }