docs: update repository structure in readme.md

feat: add examples of generated images

docs: update readme.md

feat: disable and enable download image no background button

feat: add model training files

feat: add image background removing request

feat: add image processor, attributes parser, lora weights load

fix: added missing download error alert

test: add comments to tests

feat: add 'Tattoo' to prompt

test: add validate.js and download.js unittest

test: add server unittests

feat: add error handle in server.py and download.js

feat: generated images named by current datetime

feat: add incorrect prompt handler in backend

feat: add language detection

docs: add comments to code

feat: add server is busy alert

feat: add text validation

feat: add download generated image function