Reorganize repo: one folder per application under apps/.

Move docker/ and configs/ into apps/<name>/ with config/ subfolders.
Proxmox split into hosts/pve and hosts/dell-proxmox. Nginx under
infrastructure/. Update sync script, RESTORE.md, and per-app READMEs.

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

apps/proxmox/hosts/pve/lxc/110.conf

@@ -0,0 +1,12 @@
+arch: amd64
+cores: 2
+features: keyctl=1,nesting=1
+hostname: passbolt
+memory: 2048
+net0: name=eth0,bridge=vmbr0,hwaddr=BC:24:11:79:C1:11,ip=dhcp,type=veth
+onboot: 0
+ostype: debian
+rootfs: Storage:vm-110-disk-0,size=2G
+swap: 512
+tags: auth;community-script
+unprivileged: 1