Initial homelab GitOps repository setup

This commit establishes the foundation for the homelab GitOps repository:

- Created layered architecture (infrastructure/platform/apps)
- Added MCP servers umbrella chart with SOPS-encrypted secrets
- Configured Flux Kustomizations for infrastructure and platform layers
- Set up SOPS + Age for secrets management
- Added .gitignore and documentation

MCP servers include:
- Gateway with auth (API keys in encrypted secrets)
- n8n MCP (workflow automation)
- Playwright MCP (browser automation)
- Kubernetes MCP (kubectl operations)
- GitHub MCP (repository management)
- Gitea MCP (self-hosted git)
- SQLite MCP (database operations)
- Filesystem MCP (file operations)
- Fetch MCP (HTTP requests)
- Memory MCP (shared memory/state)

All secrets are encrypted with SOPS using Age encryption.

.gitignore

@@ -0,0 +1,40 @@
+# Secrets (before SOPS encryption)
+**/secrets/*.yaml.dec
+*.key
+*.pem
+age.key
+*.agekey
+.age-key.txt
+.sops.key
+
+# Helm
+*.tgz
+charts/
+Chart.lock
+
+# Flux
+.flux.yaml
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Temporary files
+*.tmp
+*.bak
+*.orig
+
+# Custom values with unencrypted secrets
+custom-values.yaml
+*-secrets.yaml.dec
+
+# Build artifacts
+dist/
+build/