Add Gotify notification component

[InterN0te]

Add Gotify notification component

This PR adds a new Gotify notification component to Viseron that allows sending notifications to a Gotify server when recordings start.

Features

• Send notifications to a Gotify server when recordings are triggered
• Configure notification priority (1-10)
• Filter notifications by object type (e.g., person, car, cat)
• Support for camera-specific configuration overrides
• Option to include thumbnail images of detected objects in notifications

Configuration

The component can be configured in the Viseron configuration file:

gotify:
  gotify_url: "https://gotify.example.com"  # URL to your Gotify server
  gotify_token: "YOUR_APPLICATION_TOKEN"     # Application token from Gotify
  priority: 5                               # Priority of the notifications (1-10)
  detection_label: "person,cat"             # Labels of objects to send notifications for
  send_thumbnail: false                     # Send a thumbnail of the detected object
  cameras:
    camera1:                              # Camera identifier with empty config
    camera2:                              # Another camera identifier
      detection_label: "car"              # Override detection label for this camera
      send_thumbnail: true                # Override thumbnail setting for this camera

Implementation Details

• Listens for the EVENT_RECORDER_START event to send notifications only when recordings are triggered
• Supports filtering by object labels to reduce notification spam
• Handles image resizing and encoding for thumbnail delivery
• Runs in a separate thread to avoid blocking the main application
• Properly handles errors and provides fallback to text-only notifications if image processing fails

Warning

I had to edit scripts/gen_docs/main.py to remove "description": null from the config.json generation to be able to commit (cf. fix convert to dictionary)

Note

This PR was in #938 but I started from a clean branch to understand the commit error so, here we go again

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[roflcoopter]

Thanks for the updates, good work.

Same question here as on your other PR, is it ready to be merged or is there anything else you would like to add?

[InterN0te]

Nope, it's ready to go for me

Thanks for your job, nice project

[InterN0te]

Or perhaps one last change, but you're telling me: shouldn't the Discord, Gotify, or Telegram components be included in a new filter in the documentation?
What about a Notification category ?

[InterN0te]

Created #947 to add Notification category. If you merge it first, I will update #941 and #944 to set them under new Notification label

[roflcoopter]

Good idea, #947 is merged!

[roflcoopter]

Great, thanks again!