feat: add app started callback

Certain step counts for DDIM cause out of bounds error

Localization Italian - Updates and additions

Removed "Peso dei bordi del punto focale" duplicated string from "Focal point edges weight"

Deleted it_IT localization file outside localization folder as it was not intentionally committed

Added translations of the new Extensions tab, and a few corrections to some previously translated descriptions/terms.

Add Extension Manager strings

Since it's fixed and working I'm updating the translations

fix broken Restart Gradio button

Added some extension KR support

Supported extensions
https://github.com/adieyal/sd-dynamic-prompts
https://github.com/yfszzx/stable-diffusion-webui-images-browser
https://github.com/DominikDoom/a1111-sd-webui-tagcomplete
https://github.com/lilly1987/AI-WEBUI-scripts-Random

I've updated a few terms and descriptions. Waiting for review and, hopefully, approval.

Added KR support for Dynamic Prompts extension - https://github.com/mkco5162/sd-dynamic-prompts

Added KR support for Dynamic Prompts extension  - https://github.com/mkco5162/sd-dynamic-prompts

not sure if this available...

Updated localization with the latest version of these Scripts/Extensions:

animator v6
StylePile
Alpha Canvas

Changed the description for the script "To Infinity and Beyond" (Verso l'infinito e oltre) from 'n' to 'Esegui n volte' (Run n times)
Added localization for the 'Random' and 'Random Grid' scripts I changed both the title and the parameters Steps and CFG labels to make it clearer that the min/max order can be inverted.
Added a few missing translations and character's corrections here and there. Still a work in progress but I will slowly fix wrong thing when I find them.

Optimize training a little

Allow trailing comma in learning rate

Update ar_AR.json

prototype progress api

Save Hypernetwork strength to infotext.

Automated testing through API [WIP, feedback required]