[SIS-9] adding migration scripts for custom commands and economy

tools/economy-migration/legacy_loader.py

@@ -0,0 +1,20 @@
+import json
+
+from dto import LegacyCredits
+
+def load_all_credits():
+    with open('settings.json') as warnings:
+        lines = warnings.read()
+        credit_obj = json.loads(lines)
+        user_list = credit_obj['384734293238749']['MEMBER']['297910194841583616']
+        all_credit_dtos = []
+        for user in user_list:
+            user_obj = user_list[user]
+            dto = LegacyCredits()
+            dto.credits = user_obj['balance']
+            dto.user_id = user
+            all_credit_dtos.append(dto)
+
+        print(f'loaded {len(all_credit_dtos)} credit entries.')
+    return all_credit_dtos
+