Project Structure hinzugefügt

Project-Structure.md

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+# Project Structure
+
+```text
+.
+├── .drone.yml
+├── .env.sample
+├── docker-compose.yml
+├── docker-compose.firebird.yml
+├── README.md
+├── README.de.md
+├── docs/
+│   ├── BUILD.md
+│   ├── DEVELOPERS.md
+│   ├── MIGRATION_README.md
+│   └── MIGRATION_WORKFLOW.md
+├── romexis-base/
+│   └── Dockerfile
+├── romexis-payload/
+│   ├── Dockerfile
+│   ├── romexis-versions.env
+│   ├── romexis-copy-map.tsv
+│   ├── download-romexis-installer-parts.py
+│   └── extract-and-copy-romexis-parts.sh
+├── romexis-firebird-payload/
+│   ├── Dockerfile
+│   ├── romexis-firebird-versions.env
+│   └── helper scripts
+├── romexis/
+│   ├── Dockerfile
+│   ├── entrypoint.sh
+│   ├── init-romexis-db.sh
+│   ├── init-romexis-mssql-db.sh
+│   ├── init-romexis-firebird-db.sh
+│   ├── fix-keystore-alias.sh
+│   └── RomexisPropertyAgent.java
+├── migration-service/
+│   ├── Dockerfile
+│   ├── entrypoint.sh
+│   ├── app/
+│   ├── scripts/
+│   └── ssh/
+└── migration-client/
+    └── client files
+```
+
+---
+
+## Root README Files
+
+Only the main README files should stay at repository root:
+
+```text
+README.md
+README.de.md
+```
+
+Extended documentation belongs in:
+
+```text
+docs/
+```
+
+The wiki can then provide a navigable, user-facing documentation layer.