Api improvements (#15327)

* Organize api files

* Add more API definitions for events

* Add export select by ID

* Typing fixes

* Update openapi spec

* Change type

* Fix test

* Fix message

* Fix tests

frigate/api/defs/query/media_query_parameters.py

@@ -0,0 +1,42 @@
+from enum import Enum
+from typing import Optional
+
+from pydantic import BaseModel
+
+
+class Extension(str, Enum):
+    webp = "webp"
+    png = "png"
+    jpg = "jpg"
+    jpeg = "jpeg"
+
+
+class MediaLatestFrameQueryParams(BaseModel):
+    bbox: Optional[int] = None
+    timestamp: Optional[int] = None
+    zones: Optional[int] = None
+    mask: Optional[int] = None
+    motion: Optional[int] = None
+    regions: Optional[int] = None
+    quality: Optional[int] = 70
+    height: Optional[int] = None
+
+
+class MediaEventsSnapshotQueryParams(BaseModel):
+    download: Optional[bool] = False
+    timestamp: Optional[int] = None
+    bbox: Optional[int] = None
+    crop: Optional[int] = None
+    height: Optional[int] = None
+    quality: Optional[int] = 70
+
+
+class MediaMjpegFeedQueryParams(BaseModel):
+    fps: int = 3
+    height: int = 360
+    bbox: Optional[int] = None
+    timestamp: Optional[int] = None
+    zones: Optional[int] = None
+    mask: Optional[int] = None
+    motion: Optional[int] = None
+    regions: Optional[int] = None