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/dell-proxmox/datacenter.cfg

@@ -0,0 +1,15 @@
+#TURNKEY linux IP console in de containers%3A /usr/bin/confconsole
+#
+#Yuno apt update && apt install curl -y curl https%3A//install.yunohost.org | bash
+#
+#bitmagnet http%3A//192.168.1.33%3A3333
+#
+#n8n%3A http%3A//192.168.1.64%3A5678
+#
+#Hostname%3A nginxproxymanager IP Address%3A 192.168.1.172 username%3A mo@el-kadi.nl PW%3A WaQTUw2t
+#
+#NextcloudPI%3A https%3A//192.168.1.115/ Username%3A ncp PW%3A MgaozEYrg1GntANU9oq5tpCb4QJsr15MGAkrzW3bjRc
+#
+#Nextcloud%3A username%3A ncp ybHk37poARZPGv3B8R9u8D2HCLIiytrFQXUq+l+nbjk
+
+keyboard: en-us