Update contribution guidelines

[bmuenzenmeyer]

• current branching strategy
• commits should reference issues
• large enhancements should start with an issue, not a cold PR

[ms10398]

I claim this issue I would love to contribute to the repository.

[ms10398]

Can you tell me more about the current branching strategy as I am new and I dont know about it

[prateekiiest]

Hey @bmuenzenmeyer ,
I would like to solve this issue.
I am sending a PR soon for this.

[ms10398]

I was already working on it.