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.

clusters/production/platform.yaml

@@ -0,0 +1,21 @@
+apiVersion: kustomize.toolkit.fluxcd.io/v1
+kind: Kustomization
+metadata:
+  name: platform
+  namespace: flux-system
+spec:
+  interval: 10m
+  timeout: 5m
+  sourceRef:
+    kind: GitRepository
+    name: homelab
+  path: ./platform
+  prune: true
+  wait: true
+  # Depend on infrastructure being ready first
+  dependsOn:
+    - name: infrastructure
+  decryption:
+    provider: sops
+    secretRef:
+      name: sops-age