Refactor code to update .gitignore and include necessary files for repository

.gitignore

@@ -1,9 +1,6 @@
 # .gitignore
 *
-!env_manager.py
+!env_manager/
 !README.md
 !setup.py
-!.gitignore
-!__init__.py
-!/env_manager/*
-!/env_manager
+!.gitignore

env_manager/__init__.py

@@ -1,3 +1,5 @@
-from env_manager import get_env
+from .env_manager import get_env
+
+# Initialize environment variables
 get_env()
 print("Environment variables set from ArangoDB by env_manager.")

setup.py

@@ -10,7 +10,7 @@ setup(
     ],
     entry_points={
         'console_scripts': [
-            'env_manager=env_manager:main',
+            'env_manager=env_manager.env_manager:main',
         ],
     },
 )