changed backend directory as python module

[FadyCoding]

Describe your changes

Created a python module to launch DebiAI in a standalone state. The previous backend directory has been changed into debiaiServer python module. These changes allow users to start the debiai interface, in this context called debiai-gui, more quickly with a single command.

Screenshots (if appropriate):

Issue ticket number and link

https://github.com/debiai/DebiAI/issues/205

Checklist before requesting a review

• [x] I have performed a self-review of my code
• [x] I have increased the version number in the frontend/package.json and backend/swagger.yaml files
• [x] I have checked that Black, Flake8, Prettier and Cspell are passing