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/guacamole/guacamole.properties

@@ -0,0 +1,17 @@
+postgresql-hostname: localhost
+postgresql-port: 5432
+postgresql-database: guacamole_db
+postgresql-username: guacamole
+postgresql-password: null
+
+# ldap-hostname: ldap.example.net
+# ldap-port: 389
+# ldap-encryption-method: none
+# ldap-max-search-results: 1000
+# ldap-search-bind-dn:
+# ldap-search-bind-password:
+# ldap-user-base-dn: ou=people,dc=example,dc=net
+# ldap-username-attribute: uid
+# ldap-user-search-filter: (objectClass=*)
+
+enable-clipboard-integration: true