feat: local tier gateway with PGlite + Gitea-only publishing + repo linking

- Add PGlite (embedded Postgres) for local tier — gateway runs without
  external PG server. Same schema, same Drizzle API, zero module refactor.
- Install wizard now offers tier selection (local vs team).
  Local skips DATABASE_URL/VALKEY_URL, writes mosaic.config.json.
- Comment out npmjs publish step in CI (preserved for future use).
- Revert gateway publishConfig to Gitea registry, include in Gitea publish.
- Add repository field to all 23 publishable package.json files for
  Gitea package-to-repo linking.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.woodpecker/publish.yml

@@ -36,29 +36,29 @@ steps:
         echo "//git.mosaicstack.dev/api/packages/mosaic/npm/:_authToken=$NPM_TOKEN" > ~/.npmrc
         echo "@mosaic:registry=https://git.mosaicstack.dev/api/packages/mosaic/npm/" >> ~/.npmrc
       # Publish non-private packages to Gitea (--no-git-checks skips dirty/branch checks in CI)
-      # --filter excludes gateway (published to npmjs instead) and web (private)
+      # --filter excludes web (private)
       - >
         pnpm --filter "@mosaic/*"
-        --filter "!@mosaic/gateway"
         --filter "!@mosaic/web"
         publish --no-git-checks --access public
         || echo "[publish] Some packages may already exist at this version — continuing"
     depends_on:
       - build
 
-  publish-npmjs:
-    image: *node_image
-    environment:
-      NPM_TOKEN:
-        from_secret: npmjs_token
-    commands:
-      - *enable_pnpm
-      - apk add --no-cache jq bash
-      - bash scripts/publish-npmjs.sh
-    depends_on:
-      - build
-    when:
-      - event: [tag]
+  # TODO: Uncomment when ready to publish to npmjs.org
+  # publish-npmjs:
+  #   image: *node_image
+  #   environment:
+  #     NPM_TOKEN:
+  #       from_secret: npmjs_token
+  #   commands:
+  #     - *enable_pnpm
+  #     - apk add --no-cache jq bash
+  #     - bash scripts/publish-npmjs.sh
+  #   depends_on:
+  #     - build
+  #   when:
+  #     - event: [tag]
 
   build-gateway:
     image: gcr.io/kaniko-project/executor:debug