Resolve *almost* all pylint complaints and setup pylint

examples/basic_generation.py

@@ -8,15 +8,15 @@ import asyncio
 
 import edge_tts
 
+TEXT = "Hello World!"
+VOICE = "en-GB-SoniaNeural"
+OUTPUT_FILE = "test.mp3"
 
-async def main() -> None:
-    TEXT = "Hello World!"
-    VOICE = "en-GB-SoniaNeural"
-    OUTPUT_FILE = "test.mp3"
 
+async def _main() -> None:
     communicate = edge_tts.Communicate(TEXT, VOICE)
     await communicate.save(OUTPUT_FILE)
 
 
 if __name__ == "__main__":
-    asyncio.get_event_loop().run_until_complete(main())
+    asyncio.get_event_loop().run_until_complete(_main())