Improve Notifications (#16453)

* backend

* frontend

* add notification config at camera level

* camera level notifications in dispatcher

* initial onconnect

* frontend

* backend for suspended notifications

* frontend

* use base communicator

* initialize all cameras in suspended array and use 0 for unsuspended

* remove switch and use select for suspending in frontend

* use timestamp instead of datetime

* frontend tweaks

* mqtt docs

* fix button width

* use grid for layout

* use thread and queue for processing notifications with 10s timeout

* clean up

* move async code to main class

* tweaks

* docs

* remove warning message

frigate/config/camera/notification.py

@@ -0,0 +1,15 @@
+from typing import Optional
+
+from pydantic import Field
+
+from ..base import FrigateBaseModel
+
+__all__ = ["NotificationConfig"]
+
+
+class NotificationConfig(FrigateBaseModel):
+    enabled: bool = Field(default=False, title="Enable notifications")
+    email: Optional[str] = Field(default=None, title="Email required for push.")
+    enabled_in_config: Optional[bool] = Field(
+        default=None, title="Keep track of original state of notifications."
+    )