Feature Request: Translate only changed text

[fell-lucas]

Hey! I've recently integrated this in one of my projects, the work you've done here is amazing!

I have an idea that might improve the results and consume less tokens from DeepL: Is it possible to check for changed/added translations and send only those texts to DeepL? I imagine the implementation would be something like: (considering a flat .json scenario)

• Compare the changed lines in the source file with the same file in the main/master branch.
  • If there is no file to compare it to, consider all lines as new
  • If there is, save the new and changed lines in a temporary json
• Submit the temporary file to DeepL for translations
• Merge the new modified translations from DeepL into the respective flat .json outputs

What do you think?