Reorganize proxmox documentation into subdirectories per LXC/VM

- Create cluster/ for Proxmox cluster infrastructure (SSH guide, HA monitor, UPS)
- Create lxc108-oracle/ for Oracle Database documentation and scripts
- Create vm201-windows/ for Windows 11 VM docs and SSL certificate scripts
- Add SSL certificate monitoring scripts (check-ssl-certificates.ps1, monitor-ssl-certificates.sh)
- Remove archived VM107 references (decommissioned)
- Update all cross-references between files
- Update main README.md with new structure and navigation

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

proxmox/cluster/ups/config/notification-templates/ups-power-event-body.txt.hbs

@@ -0,0 +1,31 @@
+========================================
+UPS POWER EVENT - {{ event_title }}
+========================================
+
+Hostname: {{ hostname }}
+Date: {{ event_date }}
+Event: {{ event_type }}
+
+{{ event_description }}
+
+UPS STATUS:
+-----------
+Status: {{ ups_status }}
+Battery Charge: {{ battery_charge }}%
+Input Voltage: {{ input_voltage }}V
+{{#if battery_runtime}}
+Battery Runtime: {{ battery_runtime }} min
+{{/if}}
+
+{{#if action_taken}}
+ACTION: {{ action_taken }}
+{{/if}}
+
+{{#if next_steps}}
+NEXT STEPS: {{ next_steps }}
+{{/if}}
+
+========================================
+Log: /var/log/ups-events.log
+Script: /usr/local/bin/upssched-cmd
+========================================