feat: add update and delete for tribes

backend/repository/tribe_sqlite_repository.py

@@ -7,8 +7,7 @@ class TribeSQLiteRepository(AbstractRepository):
         self.conn = conn
 
     def add(self, tribe: Tribe) -> None:
-        cursor = self.conn.cursor()
-        cursor.execute(
+        self.conn.execute(
             """
         INSERT INTO tribes(name, level) VALUES (?, ?)
         """,
@@ -19,7 +18,16 @@ class TribeSQLiteRepository(AbstractRepository):
         )
 
     def update(self, name: str, tribe: Tribe) -> None:
-        pass
+        self.conn.execute(
+            """
+            UPDATE tribes SET name=:newname, level=:newlevel WHERE name=:name
+            """,
+            {
+                "newname": tribe.name,
+                "newlevel": tribe.level,
+                "name": name,
+            },
+        )
 
     def get(self, name: str) -> Tribe:
         cursor = self.conn.cursor()
@@ -48,4 +56,11 @@ class TribeSQLiteRepository(AbstractRepository):
         return [Tribe(*r) for r in rows]
 
     def delete(self, tribe: Tribe) -> None:
-        pass
+        self.conn.execute(
+            """
+            DELETE FROM tribes WHERE name=:name
+            """,
+            {
+                "name": tribe.name,
+            },
+        )