Initial commit: Ultimate Notetaking, Sync & Backup System

A NixOS-based system for managing personal data across three tiers:
- Tier 1: Configuration (shareable via git)
- Tier 2: Syncable data (nb + Syncthing)
- Tier 3: Large data (self-hosted services + backup)

Includes:
- NixOS modules for nb, Syncthing, backup (restic)
- Server modules for Forgejo, Immich, Jellyfin
- Helper scripts (usync, ustatus)
- Comprehensive documentation

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,28 @@
+# Nix
+result
+result-*
+.direnv/
+
+# Secrets (NEVER commit unencrypted secrets)
+secrets/*.yaml
+!secrets/secrets.yaml.example
+*.key
+*.pem
+.age
+.sops
+
+# Editor
+*.swp
+*.swo
+*~
+.vim/
+.nvim/
+.vscode/
+.idea/
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Hardware configs (machine-specific)
+hosts/*/hardware-configuration.nix