docs: add Proxmox VE LXC install guide and update CI ignore paths

- Add wiki/Install-Proxmox.md with full install/update/log instructions
- Add Proxmox VE section to wiki/Updating.md
- Add Install: Proxmox VE (LXC) to wiki/_Sidebar.md
- Add "Proxmox Community Script" option to bug report install dropdown
- Exclude GitHub meta files from triggering Docker CI workflow

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -62,6 +62,7 @@ body:
         - Docker (standalone)
         - Kubernetes / Helm
         - Unraid template
+        - Proxmox Community Script
         - Sources
         - Other
     validations:

.github/workflows/docker.yml

@@ -8,6 +8,9 @@ on:
       - '**/*.md'
       - 'wiki/**'
       - '.github/workflows/wiki.yml'
+      - '.github/ISSUE_TEMPLATE/**'
+      - '.github/FUNDING.yml'
+      - '.github/PULL_REQUEST_TEMPLATE.md'
   workflow_dispatch:
     inputs:
       bump: