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/kustomization.yaml

@@ -0,0 +1,11 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - mcp-servers
+  # Add other platform services as they are migrated:
+  # - gitea
+  # - harbor
+  # - n8n
+  # - gotify
+  # - prometheus