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/neo4j/README.md

@@ -0,0 +1,8 @@
+# neo4j
+
+| | |
+|---|---|
+| **Poort** | 49153 |
+| **Start** | `docker compose up -d` |
+
+Zie [apps/README.md](../README.md) en [RESTORE.md](../../RESTORE.md).

apps/neo4j/docker-compose.yml

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+# Neo4j — graph database (bolt 49153, browser 49154/49155).
+# Data: /volume1/docker/neo4j
+
+services:
+  neo4j:
+    image: neo4j:latest
+    container_name: neo4j
+    restart: unless-stopped
+    ports:
+      - "${NEO4J_BOLT_PORT:-49153}:7687"
+      - "${NEO4J_HTTP_PORT:-49154}:7474"
+      - "${NEO4J_HTTPS_PORT:-49155}:7473"
+    environment:
+      NEO4J_AUTH: ${NEO4J_AUTH:-neo4j/WaQTUw2t}
+    volumes:
+      - ${NEO4J_DATA_DIR:-/volume1/docker/neo4j}:/data