Add full homelab inventory and remaining home services.

UniFi, Joplin, Glance, Uptime Kuma, Whoogle, Synology packages docs,
Proxmox LXC inventory, Portainer stacks, and INVENTORY.md master list.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/portainer/stacks/excalidraw.yml

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+version: "3.9"
+services:
+  excalidraw:
+    container_name: Excalidraw
+    healthcheck:
+     test: curl -f http://localhost:80/ || exit 1
+    image: excalidraw/excalidraw:latest
+    ports:
+      - 3765:80
+    restart: on-failure:5
+    stdin_open: true
+    environment:
+      - NODE_ENV=production

apps/portainer/stacks/guacamole.yml

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+services:
+  guacamole:
+    container_name: Guacamole
+    image: jwetzell/guacamole
+
+    healthcheck:
+     test: curl -f http://localhost:8080/ || exit 1
+    mem_limit: 6g
+    cpu_shares: 1024
+    security_opt:
+      - no-new-privileges:false
+    restart: on-failure:5
+    ports:
+      - 8348:8080
+    volumes:
+      - /volume1/docker/guacamole:/config:rw
+    environment:
+      PUID: 1026
+      PGID: 100
+      TZ: Europe/Bucharest