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.

platform/mcp-servers/helmrelease.yaml

@@ -0,0 +1,41 @@
+apiVersion: helm.toolkit.fluxcd.io/v2
+kind: HelmRelease
+metadata:
+  name: mcp-umbrella
+  namespace: mcp
+spec:
+  interval: 10m
+  timeout: 5m
+  chart:
+    spec:
+      chart: ./platform/mcp-servers
+      sourceRef:
+        kind: GitRepository
+        name: homelab
+        namespace: flux-system
+      interval: 5m
+
+  # Depend on namespace and secrets
+  dependsOn:
+    - name: mcp-secrets
+      namespace: mcp
+
+  install:
+    createNamespace: false
+    remediation:
+      retries: 3
+
+  upgrade:
+    remediation:
+      retries: 3
+      remediateLastFailure: true
+    cleanupOnFail: true
+
+  valuesFrom:
+    - kind: ConfigMap
+      name: mcp-umbrella-values
+      optional: true
+
+  values:
+    # Values from values.yaml will be automatically used
+    # Additional overrides can be placed here