feat(astrolabe): add Nextcloud App Store deployment automation

Add complete CI/CD pipeline for automated Astrolabe app releases:
- GitHub Actions workflow for build, sign, and publish
- Makefile for app store package creation
- Version synchronization between info.xml and package.json
- CHANGELOG.md with v0.1.0 release notes

feat: configure commitizen monorepo with independent versioning

Enable independent versioning for three components using scope-based commits:
- MCP Server (feat(mcp) or unscoped): v* tags, updates pyproject.toml + Chart.yaml:appVersion
- Helm Chart (feat(helm)): nextcloud-mcp-server-* tags, updates Chart.yaml:version
- Astrolabe App (feat(astrolabe)): astrolabe-v* tags, updates info.xml + package.json

Changes:
- Add .cz.toml configs for Astrolabe and Helm chart
- Update root pyproject.toml with scope filtering and tag ignores
- Create bump helper scripts (bump-mcp.sh, bump-helm.sh, bump-astrolabe.sh)
- Add CONTRIBUTING.md with version management documentation
- Create component-specific changelogs
- Configure appVersion/version separation for Helm chart

This allows each component to release independently while maintaining
proper version tracking and changelog generation.

pyproject.toml

@@ -89,14 +89,23 @@ version_scheme = "pep440"
 version_provider = "uv"
 update_changelog_on_bump = true
 major_version_zero = true
+
+# MCP server version files + Helm appVersion
 version_files = [
-    "charts/nextcloud-mcp-server/Chart.yaml:appVersion",
-    "charts/nextcloud-mcp-server/Chart.yaml:version"
+    "charts/nextcloud-mcp-server/Chart.yaml:^appVersion:",
 ]
+
+# Ignore tags from other components
 ignored_tag_formats = [
-    "nextcloud-mcp-server-*"
+    "nextcloud-mcp-server-*",  # Helm chart tags
+    "astrolabe-v*",            # Astrolabe tags
 ]
 
+# Filter commits by scope (mcp or unscoped)
+[tool.commitizen.customize]
+changelog_pattern = "^(feat|fix|docs|refactor|perf|test|build|ci|chore)(\\(mcp\\))?(!)?:"
+schema_pattern = "^(feat|fix|docs|refactor|perf|test|build|ci|chore)(\\(mcp\\))?(!)?:\\s.+"
+
 [tool.ruff.lint]
 extend-select = ["I"]