deps: install @ng-org packages from npm instead of local tarballs

The @ng-org/* SDK alpha versions are now published on npm. Switch the
package.json dependencies from .ng-tarballs/*.tgz paths to npm
versions, removing the need for a sibling nextgraph-rs build to
install the project. Makes containerized deploys (Coolify) trivial.

- @ng-org/alien-deepsignals: 0.1.2-alpha.11 (unchanged)
- @ng-org/orm: 0.1.2-alpha.15 → 0.1.2-alpha.18
- @ng-org/shex-orm: 0.1.2-alpha.7 → 0.1.2-alpha.8
- @ng-org/web: 0.1.2-alpha.11 → 0.1.2-alpha.13

scripts/build-ng-packages.sh and the .ng-tarballs/ workflow remain
available for local development against an unreleased nextgraph-rs
build (`.gitignore` keeps the directory ignored).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

package.json

@@ -20,10 +20,10 @@
     "build-storybook": "storybook build"
   },
   "dependencies": {
-    "@ng-org/alien-deepsignals": ".ng-tarballs/ng-org-alien-deepsignals-0.1.2-alpha.11.tgz",
-    "@ng-org/orm": ".ng-tarballs/ng-org-orm-0.1.2-alpha.15.tgz",
-    "@ng-org/shex-orm": ".ng-tarballs/ng-org-shex-orm-0.1.2-alpha.7.tgz",
-    "@ng-org/web": ".ng-tarballs/ng-org-web-0.1.2-alpha.11.tgz",
+    "@ng-org/alien-deepsignals": "0.1.2-alpha.11",
+    "@ng-org/orm": "0.1.2-alpha.18",
+    "@ng-org/shex-orm": "0.1.2-alpha.8",
+    "@ng-org/web": "0.1.2-alpha.13",
     "@radix-ui/react-label": "^2.1.7",
     "@radix-ui/react-select": "^2.2.6",
     "@radix-ui/react-slot": "^1.2.3",