Fix inbox creation issues in agent coordinator

- Fixed Task.new/3 to handle both maps and keyword lists
- Added robust inbox existence checking in find_available_agent
- Ensure inbox creation during agent registration and task assignment
- Add helper function ensure_inbox_exists to avoid crashes

.gitignore

@@ -21,3 +21,73 @@ agent_coordinator-*.tar
 
 # Temporary files, for example, from tests.
 /tmp/
+
+# IDE and Editor files
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+.DS_Store
+.vimrc
+.vim/
+
+# OS generated files
+Thumbs.db
+
+# Log files
+*.log
+logs/
+/tmp/nats.log
+/tmp/nats.pid
+
+# Environment and configuration files
+.env
+.env.local
+.env.production
+config/dev.secret.exs
+config/prod.secret.exs
+
+# Development and testing artifacts
+*.beam
+*.plt
+*.dialyzer_plt
+dialyzer_plt
+dialyzer.plt
+priv/plts/
+
+# NATS related files
+nats.log
+nats.pid
+
+# Python cache and virtual environments
+__pycache__/
+*.py[cod]
+*$py.class
+.Python
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+.pytest_cache/
+
+# Node.js (if any frontend components are added)
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Coverage reports
+cover/
+coverage/
+*.cover
+*.lcov
+
+# Backup files
+*.backup
+*.bak
+*.orig
+
+# Claude settings (local configuration)
+.claude/