ci(gitea): shared composite actions + pipeline generator for Gitea Actions

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AqpXh3hQMMaC74pTjFq4it

Gitea 1.25 cannot run reusable workflows (workflow_call), so the logic of
deploy-app.yml, smoke.yml and ci.yml moves into composite actions under
.gitea/actions/, and each repo gets a thin pipeline rendered by
tools/gitea-pipeline/render.py from repos.json. .github/workflows is left
untouched (Gitea ignores it once .gitea/workflows exists).

.gitea/workflows/pipeline.yml

@@ -0,0 +1,39 @@
+# GENERATED by peptide-e2e/tools/gitea-pipeline/render.py from repos.json.
+# Do not edit by hand: change repos.json or the template and re-render.
+name: CI / Deploy
+
+on:
+  push:
+    branches: [main]
+  pull_request: {}
+  workflow_dispatch: {}
+
+concurrency:
+  group: pipeline-peptide-e2e-${{ github.ref }}
+  cancel-in-progress: false
+
+jobs:
+  lint-php:
+    name: PHP Lint (${{ matrix.php }})
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        php: ["8.1", "8.2", "8.3"]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: https://git.protopeer.com/peptide-repo/peptide-e2e/.gitea/actions/ci-lint-php@main
+        with:
+          php: ${{ matrix.php }}
+
+  phpcs:
+    name: PHPCS (WordPress standards)
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.head_ref || github.ref_name }}
+          token: ${{ secrets.GITHUB_TOKEN }}
+      - uses: https://git.protopeer.com/peptide-repo/peptide-e2e/.gitea/actions/ci-phpcs@main
+        with:
+          autofix: 'false'