Feat: github connector (#12292)

### What problem does this PR solve?

Feat: github connector

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

common/data_source/github/models.py

@@ -0,0 +1,17 @@
+from typing import Any
+
+from github import Repository
+from github.Requester import Requester
+from pydantic import BaseModel
+
+
+class SerializedRepository(BaseModel):
+    # id is part of the raw_data as well, just pulled out for convenience
+    id: int
+    headers: dict[str, str | int]
+    raw_data: dict[str, Any]
+
+    def to_Repository(self, requester: Requester) -> Repository.Repository:
+        return Repository.Repository(
+            requester, self.headers, self.raw_data, completed=True
+        )