NextGraph integration (WIP), broker banner, and feature-based architecture

- Add NextGraph data layer with @ng-org/orm, SHEX shapes (Event, UserProfile,
  Participation), session management, and FestipodDataContext with dual-mode
  operation (connected via NextGraph or local seed data)
- Add BrokerBanner and NgStatus components showing connection status
- Refactor to feature-based architecture: organize code by business domain
  (event, user, home, auth, workshop, meeting, notification) instead of
  technical layer. Modules only import from shared/, never from each other
- Collocate BDD features and step definitions with their modules: event-specific
  steps in event/steps/, user steps in user/steps/, shared generic steps remain
  in shared/steps/
- Set up multi-layer BDD structure (frontend/backend/e2e steps per module)
- Add project documentation (AGENTS.md, .project/knowledge/)

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

patches/@ng-org%2Form@0.1.2-alpha.4.patch

@@ -0,0 +1,74 @@
+diff --git a/node_modules/@ng-org/orm/.bun-tag-78937f1a8bb90c1e b/.bun-tag-78937f1a8bb90c1e
+new file mode 100644
+index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
+diff --git a/package.json b/package.json
+index 33023505142d0c7f1dfe9861e8f2adce15ffa2e0..226fd1f6eff39fc6891d8dd5ac2bade3670cae66 100644
+--- a/package.json
++++ b/package.json
+@@ -30,36 +30,47 @@
+     "access": "public"
+   },
+   "dependencies": {
+-    "@astrojs/react": "4.3.0",
+-    "@astrojs/svelte": "7.1.0",
+-    "@astrojs/vue": "^5.1.0",
+-    "@gn8/alien-signals-react": "^0.1.1",
+-    "@gn8/alien-signals-solid": "^0.1.1",
+-    "@gn8/alien-signals-svelte": "^0.1.1",
+-    "@gn8/alien-signals-vue": "^0.1.1",
+-    "@types/react": "19.1.10",
+-    "@types/react-dom": "19.1.7",
+-    "@types/shexj": "^2.1.7",
+     "alien-signals": "^2.0.7",
+-    "astro": "5.13.2",
+-    "install": "^0.13.0",
+-    "npm": "^11.5.2",
+-    "prettier-eslint": "^16.4.2",
+-    "react": "19.1.1",
+-    "react-dom": "19.1.1",
+-    "svelte": "5.39.12",
+-    "vue": "3.5.19",
+     "@ng-org/shex-orm": "0.1.2-alpha.2",
+-    "@ng-org/alien-deepsignals": "0.1.2-alpha.3"
++    "@ng-org/alien-deepsignals": "0.1.2-alpha.3",
++    "@types/shexj": "^2.1.7"
++  },
++  "peerDependencies": {
++    "react": ">=18",
++    "react-dom": ">=18",
++    "svelte": ">=4",
++    "vue": ">=3",
++    "@gn8/alien-signals-react": "^0.1.1",
++    "@gn8/alien-signals-svelte": "^0.1.1",
++    "@gn8/alien-signals-vue": "^0.1.1"
++  },
++  "peerDependenciesMeta": {
++    "react": { "optional": true },
++    "react-dom": { "optional": true },
++    "svelte": { "optional": true },
++    "vue": { "optional": true },
++    "@gn8/alien-signals-react": { "optional": true },
++    "@gn8/alien-signals-svelte": { "optional": true },
++    "@gn8/alien-signals-vue": { "optional": true }
+   },
+   "devDependencies": {
+     "@playwright/test": "^1.55.0",
+     "@types/node": "24.3.0",
+     "@types/react": "19.1.10",
+     "@types/react-dom": "19.1.7",
++    "svelte": "5.39.12",
++    "vue": "3.5.19",
++    "astro": "5.13.2",
++    "@astrojs/react": "4.3.0",
++    "@astrojs/svelte": "7.1.0",
++    "@astrojs/vue": "^5.1.0",
++    "@gn8/alien-signals-react": "^0.1.1",
++    "@gn8/alien-signals-svelte": "^0.1.1",
++    "@gn8/alien-signals-vue": "^0.1.1",
+     "vite": "7.1.3",
+     "vitest": "^3.2.4",
+     "typescript": "^5.3.0",
++    "prettier-eslint": "^16.4.2",
+     "@ng-org/lib-wasm": "0.1.2-alpha.1"
+   },
+   "files": [