Restore Rust core at repository root

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

@@ -8,7 +8,7 @@
       "name": "yawn",
       "version": "0.1.0",
       "workspaces": [
-        "packages/*",
+        "core",
         "addons/*"
       ],
       "devDependencies": {
@@ -45,6 +45,10 @@
         "@yawn/render-graph-ast": "0.1.0"
       }
     },
+    "core": {
+      "name": "@yawn/core",
+      "version": "0.1.0"
+    },
     "node_modules/@algolia/abtesting": {
       "version": "1.23.0",
       "resolved": "https://registry.npmjs.org/@algolia/abtesting/-/abtesting-1.23.0.tgz",
@@ -1238,7 +1242,7 @@
       }
     },
     "node_modules/@yawn/core": {
-      "resolved": "packages/yawn-core",
+      "resolved": "core",
       "link": true
     },
     "node_modules/@yawn/default-pipelines": {
@@ -2256,10 +2260,6 @@
         "type": "github",
         "url": "https://github.com/sponsors/wooorm"
       }
-    },
-    "packages/yawn-core": {
-      "name": "@yawn/core",
-      "version": "0.1.0"
     }
   }
 }