Initial Homepage dashboard configuration

Services, widgets, layout and settings for the homelab dashboard.
Secrets are externalized via {{HOMEPAGE_VAR_*}} placeholders and
supplied through a local .env file (not committed).

bookmarks.yaml

@@ -0,0 +1,16 @@
+---
+# For configuration options and examples, please see:
+# https://gethomepage.dev/configs/bookmarks
+
+- Developer:
+    - Github:
+        - abbr: GH
+          href: https://github.com/
+    - Proxmox Docs:
+        - abbr: PVE
+          href: https://pve.proxmox.com/pve-docs/
+
+- Entertainment:
+    - YouTube:
+        - abbr: YT
+          href: https://youtube.com/