refactor: Reorganize datamate-python (#34)

refactor: Reorganize datamate-python (previously label-studio-adapter) into a DDD style structure.

runtime/datamate-python/app/module/annotation/interface/__init__.py

@@ -0,0 +1,12 @@
+from fastapi import APIRouter
+
+from .project import router as project_router
+from .task import router as task_router
+
+router = APIRouter(
+    prefix="/annotation",
+    tags = ["annotation"]
+)
+
+router.include_router(project_router)
+router.include_router(task_router)