Delete near Enemy Detect future. Use different density sensor.

Unity:
No more detect Closest enemy info. Add different density sensor let agent get more state information on the center of view. 
Adjust Start Scene UI manager. Add in game visible rayCast & information that rayCast detect.
Python:
Start use mypy black and flake8 to format Python.

.gitignore

@@ -77,4 +77,5 @@ crashlytics-build.properties
 /Aimbot-PPO-Python/__pycache__/
 /Aimbot-PPO-Python/Backup/
 /Aimbot-PPO-Python/Build-MultiScene-WithLoad/
-/Aimbot-PPO-Python/PPO-Model
+/Aimbot-PPO-Python/Build-CloseEnemyCut/
+/Aimbot-PPO-Python/PPO-Model/