feat(release): publish minimal self-contained Magent source

.gitignore

@@ -0,0 +1,26 @@
+.env
+.env.*
+!.env.example
+.venv/
+**/__pycache__/
+*.pyc
+**/.pytest_cache/
+.coverage
+coverage.xml
+htmlcov/
+frontend/node_modules/
+frontend/.next/
+*.tsbuildinfo
+*.log
+*.db
+*.db-*
+*.sqlite*
+*.magent-backup
+bootstrap-admin.json
+bootstrap-secrets.json
+.magent-secrets-*
+data/*
+!data/branding/
+*.tar
+*.tar.gz
+*.zip