Add reusable Forgejo Actions

Composite actions for CI/CD workflows:
- checkout: Clone repo with configurable depth
- docker-build: Build Docker images with multiple tags
- docker-push: Push to Forgejo Packages registry
- create-tag: Auto-increment semantic version tags
- create-issue: Create issues via Forgejo API
- create-pr: Create pull requests via Forgejo API
- comment-pr: Add comments to PRs via Forgejo API

All actions use shell scripts (no Node.js required).

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

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

comment-pr/action.yaml

@@ -0,0 +1,43 @@
+name: Comment on PR
+description: Add a comment to a pull request via Forgejo API
+
+inputs:
+  token:
+    description: Forgejo API token
+    required: true
+  repository:
+    description: Repository (owner/repo)
+    default: ${{ github.repository }}
+  pr-number:
+    description: Pull request number
+    required: true
+  body:
+    description: Comment body
+    required: true
+
+outputs:
+  id:
+    description: Created comment ID
+    value: ${{ steps.comment.outputs.id }}
+
+runs:
+  using: composite
+  steps:
+    - id: comment
+      shell: bash
+      run: |
+        TOKEN="${{ inputs.token }}"
+        REPO="${{ inputs.repository }}"
+        PR_NUMBER="${{ inputs.pr-number }}"
+        BODY="${{ inputs.body }}"
+
+        JSON=$(jq -n --arg body "$BODY" '{body: $body}')
+
+        RESPONSE=$(curl -s -X POST \
+          "https://code.flowmade.one/api/v1/repos/$REPO/issues/$PR_NUMBER/comments" \
+          -H "Authorization: token $TOKEN" \
+          -H "Content-Type: application/json" \
+          -d "$JSON")
+
+        ID=$(echo "$RESPONSE" | jq -r '.id')
+        echo "id=$ID" >> $GITHUB_OUTPUT