Add Gitea release upload for tagged versions

When a tag is pushed, build PDFs and upload them to a
Gitea release. Uses wp-gitea-release plugin.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.woodpecker/build.yaml

@@ -1,8 +1,8 @@
 # ClearGrow Docs - PDF Generation Pipeline
-# Triggers on push to any branch and pull requests
+# Triggers on push to any branch, pull requests, and tags
 
 when:
-  - event: [push, pull_request]
+  - event: [push, pull_request, tag]
 
 steps:
   - name: build-pdfs
@@ -11,6 +11,7 @@ steps:
       - echo "=== ClearGrow Documentation Build ==="
       - 'echo "Commit: ${CI_COMMIT_SHA}"'
       - 'echo "Branch: ${CI_COMMIT_BRANCH}"'
+      - 'echo "Tag: ${CI_COMMIT_TAG}"'
       - echo ""
       # Install bash and fonts (Alpine only has sh)
       - apk add --no-cache bash font-dejavu
@@ -22,3 +23,24 @@ steps:
       - echo ""
       - 'echo "Generated PDFs:"'
       - ls -lh pdf-output/ClearGrow_*.pdf 2>/dev/null || echo "No PDFs generated"
+
+  - name: release
+    image: quay.io/thegeeklab/wp-gitea-release
+    when:
+      - event: tag
+    settings:
+      base_url: https://git.cleargrow.io
+      api_key:
+        from_secret: gitea_release_token
+      files:
+        - pdf-output/*.pdf
+      title: "Documentation ${CI_COMMIT_TAG}"
+      note: |
+        ## ClearGrow Documentation Release ${CI_COMMIT_TAG}
+
+        This release contains the following PDF documents:
+        - User Quick Start Guide
+        - Complete User Guide
+        - Developer Guide
+        - API Reference
+        - Technical Manual