Update documentation v0.1.3

[Xnsam]

1. Create a docs folder in the repo
2. Update the docs folder using sphinx-build
3. Write a github workflow to follow the flow, on push -> create an environment -> check out the latest code -> run sphinx build -> push the code to gesund-ai.github.io branch -> clean up
4. Perform manual checks for documentation. you can re-use the documentation already created to some extent.