fix(ci): trigger workflow on main branch to enable :latest tag

Changes:
- Create Gitea workflow for ai-stack-deployer
- Trigger on main branch (default branch)
- Use oussamadouhou + REGISTRY_TOKEN for authentication
- Build from ./Dockerfile

This enables :latest tag creation via {{is_default_branch}}.

Tags created:
- git.app.flexinit.nl/oussamadouhou/ai-stack-deployer:latest
- git.app.flexinit.nl/oussamadouhou/ai-stack-deployer:<sha>

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

.gitignore

@@ -0,0 +1,36 @@
+# Dependencies
+node_modules/
+
+# Build output
+dist/
+
+# Environment files
+.env
+.env.local
+.env.production
+
+# IDE
+.vscode/
+.idea/
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log
+logs/
+
+# Bun
+bun.lockb
+
+# Temporary
+tmp/
+temp/
+
+# Claude Code
+# Note: Session files stored in $HOME/.claude/sessions/ai-stack-deployer (not in project)
+.claude/projects/
+.claude/sessions/
+*.claude-session
+.claude/*.log