Add python, markdown and github action linter (#5)

to ensure the code maintenance. Thanks to docling
project- took some good bits around python linting
from the project.

These checks are also added in the markdown, so that
user can run these checks locally to recreate the
errors.

Signed-off-by: Anil Vishnoi <vishnoianil@gmail.com>

README.md

@@ -5,7 +5,6 @@
  > [!NOTE]
 > This is an unstable draft implementation which will quickly evolve.
 
-
 ## Development
 
 Install the dependencies