move common code to its own module and out of __init__.py, move command to __main__.py

quicktex/__init__.py

@@ -1 +1,6 @@
 from _quicktex import *
+
+if __name__ == "__main__":
+    from quicktex.cli.quicktex import cli
+
+    cli()

quicktex/__main__.py

@@ -5,12 +5,12 @@ from quicktex.cli.decode import decode
 
 @click.group()
 @click.version_option()
-def cli():
+def main():
     """Encode and Decode various image formats"""
 
 
-cli.add_command(encode)
-cli.add_command(decode)
+main.add_command(encode)
+main.add_command(decode)
 
 if __name__ == '__main__':
-    cli()
+    main()

setup.py

@@ -124,7 +124,7 @@ setup(
     },
     entry_points='''
         [console_scripts]
-        quicktex=quicktex.cli.quicktex:cli
+        quicktex=quicktex.__main__:main
     ''',
     zip_safe=False,
 )