implement bot keyboard with basics commands

bot_libs/player_handling.py

@@ -1,5 +1,5 @@
-async def add_player(update, context):
-  name= " ".join(context.args)
+async def add_player(update, context, name):
+  #name= " ".join(context.args)
   print(f'add_player: {name}')
   Arena= context.application.bot_data['arena']
   Arena.add_player(name)