Develop labeling module (#25)

* refactor: remove db table management from LS adapter (mv to scripts later); change adapter to use the same MySQL DB as other modules.

* refactor: Rename LS Adapter module to datamate-python

runtime/datamate-python/app/models/dm/__init__.py

@@ -0,0 +1,21 @@
+# app/models/dm/__init__.py
+
+from .annotation_template import AnnotationTemplate
+from .labeling_project import LabelingProject
+from .dataset import Dataset
+from .dataset_files import DatasetFiles
+from .dataset_statistics import DatasetStatistics
+from .dataset_tag import DatasetTag
+from .tag import Tag
+from .user import User
+
+__all__ = [
+    "AnnotationTemplate",
+    "LabelingProject",
+    "Dataset",
+    "DatasetFiles",
+    "DatasetStatistics",
+    "DatasetTag",
+    "Tag",
+    "User"
+]