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.

.sops.yaml

@@ -0,0 +1,10 @@
+creation_rules:
+  # Default rule for all encrypted files
+  - path_regex: .*\.enc\.yaml$
+    encrypted_regex: ^(data|stringData|password|token|apiKey|secret|key)$
+    age: age1c7ke5ajhtzua7lrvzsg2p7krnnqv5jhvafh4lsl2s022j46jggnss4rxry
+
+  # Alternative pattern for secrets files
+  - path_regex: secrets.*\.yaml$
+    encrypted_regex: ^(data|stringData|password|token|apiKey|secret|key)$
+    age: age1c7ke5ajhtzua7lrvzsg2p7krnnqv5jhvafh4lsl2s022j46jggnss4rxry