update more concise roadmap contribution/ commit guidelines.

[vikyaiyer]

@moghya @rahulbagad @virajvchavan @omjego list out here thoughts in the issue discussion, so that concise roadmap contribution/commit guidelines can be finalised upon and updated.

[kauziishere]

@vikyaiyer this sounds good. I was also thinking if we could decide and pick up subjects individually and add the relevant programming problems from textbooks for the subject that students can code themselves.

Additionally, I am not sure how feasible this is, but if we are also able to provide solutions to those, it'd be much better,