support custom "alwayson_scripts"

[aylz10]

#12
Add the asapi field in Custom Mode to add custom "alwayson_scripts" content (compatible with the original controlnet)
For example:
The simple API usage of the ADetailer plug-in is:

"alwayson_scripts": {
   "ADetailer": {
     true,
     true,
     "args": [
       {
         "ad_model": "face_yolov8n.pt"
       }
     ]
   }
}

Set the Custom Mode 8 content to
{"type":"txt2img", "sdSize":768,"asapi":"{\"ADetailer\": {\"args\": [true,true,{\"ad_model\": \"face_yolov8n. pt\"}]}}"}
It will take effect

PS:
Only custom modes take effect. Built-in txt2img, SDXL txt2img and Preset Modes do not take effect.
Because I don't know how to use Android Studio, Java syntax and interface design, I can only modify it simply like this.
I hope the author can design a special interface similar to “Prompt prefix” to store variables so that all presets can take effect.

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