Phase 1 sub-commit 1: scaffold framework, skeleton, CI

Stands up the directory structure Phase 1 fills in over subsequent
sub-commits: framework/php (Composer package php-qml/bridge),
framework/qml (Qt module placeholder), framework/skeleton (Caddyfile +
Makefile stubs), and .gitea/workflows/ci.yml. Root .gitignore covers
the build/composer/Symfony/Qt/CMake/IDE artefacts the rest of Phase 1
will produce. No bundle code, no Qt module sources, no working dev mode
yet — those land in sub-commits 2-7. Spike still in place.

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

.gitea/workflows/ci.yml

@@ -0,0 +1,20 @@
+name: CI
+
+on:
+  push:
+    branches: [dev, main]
+  pull_request:
+    branches: [dev, main]
+
+jobs:
+  quality:
+    name: Quality
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Quality (placeholder)
+        run: |
+          echo "quality job — populated in Phase 1 sub-commit 7"
+          echo "will run: PHPStan, php-cs-fixer (check), PHPUnit, qmllint"