chore: refactor all docker logic files structure

- Implement compose.py with functions to find compose files, list services, and aggregate service info
- Add editor.py for changing service ports with backup support
- Define DockerService model in models.py
- Refactor ports.py to support new port mapping logic and helpers
- Expose Docker Compose utilities in __init__.py

app/utils/docker/editor.py

@@ -0,0 +1,50 @@
+from pathlib import Path
+
+import yaml
+
+from utils.docker.compose import find_docker_compose
+from utils.docker.ports import _get_port_index, _replace_port_in_mapping
+
+
+def _backup_path_for(compose_path: Path) -> Path:
+    if compose_path.suffix in {".yml", ".yaml"}:
+        return compose_path.with_name(f"{compose_path.stem}.bak{compose_path.suffix}")
+    return compose_path.with_name(f"{compose_path.name}.bak")
+
+
+def change_port(
+        folder: Path,
+        service_name: str,
+        port_from: int,
+        port_to: int,
+) -> bool:
+    compose_data = find_docker_compose(folder)
+    if compose_data is None:
+        return False
+
+    docker_compose, filename = compose_data
+    compose_services = docker_compose.get("services") or {}
+    if not compose_services:
+        return False
+
+    service_config = compose_services.get(service_name)
+    if not isinstance(service_config, dict):
+        return False
+
+    mappings = service_config.get("ports")
+    if not isinstance(mappings, list):
+        return False
+
+    idx = _get_port_index(mappings, port_from)
+    if idx is None:
+        return False
+
+    mappings[idx] = _replace_port_in_mapping(mappings[idx], port_from, port_to)
+
+    compose_path = folder / filename
+    backup_path = _backup_path_for(compose_path)
+    backup_path.write_text(compose_path.read_text())
+    compose_path.write_text(yaml.dump(docker_compose, default_flow_style=False, sort_keys=False))
+
+    # TODO: run docker compose commands
+    return True