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>

scripts/parse-features.ts

@@ -1,5 +1,5 @@
 import { Glob } from 'bun';
-import type { ParsedFeature, ParsedScenario, ParsedStep } from '../src/types/gherkin';
+import type { ParsedFeature, ParsedScenario, ParsedStep } from '../src/shared/types/gherkin';
 
 // Map French screen names to screen IDs (same as navigation.steps.ts)
 const screenNameMap: Record<string, string> = {
@@ -73,7 +73,7 @@ function extractScreenIdsFromSteps(steps: ParsedStep[]): Set<string> {
 }
 
 async function parseFeatures(): Promise<ParsedFeature[]> {
-  const glob = new Glob('features/**/*.feature');
+  const glob = new Glob('src/modules/*/features/**/*.feature');
   const features: ParsedFeature[] = [];
 
   for await (const filePath of glob.scan('.')) {
@@ -116,7 +116,7 @@ export function getAllPriorities(): number[] {
 }
 `;
 
-  await Bun.write('src/data/features.ts', output);
+  await Bun.write('src/shared/data/features.ts', output);
   console.log(`Parsed ${features.length} feature files`);
   return features;
 }