feat(api): split api into multiple apps (#1626)

Fixes #1622

- split the api into 4 apps: core, history, schedule, storage
- exploded the settings into testing/prod

api/libretime_api/cli.py

@@ -1,23 +0,0 @@
-#!/usr/bin/env python3
-
-"""Django's command-line utility for administrative tasks."""
-import os
-import sys
-
-
-def main():
-    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "libretime_api.settings")
-    os.environ.setdefault("LIBRETIME_CONFIG_FILEPATH", "/etc/airtime/airtime.conf")
-    try:
-        from django.core.management import execute_from_command_line
-    except ImportError as exc:
-        raise ImportError(
-            "Couldn't import Django. Are you sure it's installed and "
-            "available on your PYTHONPATH environment variable? Did you "
-            "forget to activate a virtual environment?"
-        ) from exc
-    execute_from_command_line(sys.argv)
-
-
-if __name__ == "__main__":
-    main()