Add files of first version of plugin Bg Remover

[joselmm]

The original code (vite + react ) is in this repo https://github.com/joselmm/bg-remove
baseUrl (just to test): https://joselmm.github.io/bg-remove/dist/

[trofim24]

Hi @joselmm, thanks for submitting the BG Remover plugin!

I've reviewed the plugin against our guidelines and found a couple of issues that need to be addressed before we can merge.

Blocked Issues
Plugin not registered in store/config.json

Please add the plugin entry to store/config.json:

{ "name": "bg-remover", "discussion": "" }
Missing offered field in config.json

The provider field should be renamed to offered to follow the plugin configuration standard:

"offered": "joselmm",

Suggestions (Optional)
Consider adding separate dark/light toolbar icons in resources/dark/ and resources/light/ directories with scaled versions (@1.25x, @1.5x, @1.75x, @2x) for better theme support.
Consider using the icons2 array format in config.json for full DPI scaling support.
Please make these changes and update the PR. Let me know if you have any questions!

[joselmm]

Thanks for the suggestions, I'll let you know as soon as I make the necessary changes.