Feat: add get_tribe for sqlite

backend/repository/tribe_sqlite_repository.py

@@ -13,7 +13,19 @@ class TribeSQLiteRepository(AbstractRepository):
         pass
 
     def get(self, name: str) -> Tribe:
-        pass
+        cursor = self.conn.cursor()
+        cursor.execute(
+            """
+        SELECT * FROM tribes WHERE name=?
+        """,
+            (name,),
+        )
+
+        row = cursor.fetchone()
+        if row:
+            return Tribe(*row)
+
+        raise ValueError(f"The tribe {name} does not exists")
 
     def list(self) -> list[Tribe]:
         cursor = self.conn.cursor()
@@ -22,6 +34,7 @@ class TribeSQLiteRepository(AbstractRepository):
         SELECT * FROM tribes
         """
         )
+
         rows = cursor.fetchall()
         return [Tribe(*r) for r in rows]