Revert "Merge branch 'feature/go' into main"

Keeps the branch in history only; main's content is unchanged.

.env.example

@@ -1,11 +1,5 @@
-# TG_PHONE is phone number in international format.
-# Like +4123456789.
-TG_PHONE=your_telegram_phone_number
-
-# APP_HASH, APP_ID is from https://my.telegram.org/.
-APP_ID=your_app_id
-APP_HASH=your_app_hash
-
-# Group chat id is without -100
-SOURCE_CHAT_ID=-123456789
-TARGET_CHAT_ID=-123456789
+PHONE=+1234567890
+API_ID=123456789
+API_HASH=0123456789abcdef0123456789abcdef
+SOURCE_GROUP_ID=-123456789
+TARGET_GROUP_ID=-123456789