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/storage/models/cloud_file.py

@@ -0,0 +1,13 @@
+from django.db import models
+
+
+class CloudFile(models.Model):
+    storage_backend = models.CharField(max_length=512)
+    resource_id = models.TextField()
+    filename = models.ForeignKey(
+        "File", models.DO_NOTHING, blank=True, null=True, db_column="cc_file_id"
+    )
+
+    class Meta:
+        managed = False
+        db_table = "cloud_file"