chore: create CONTRIBUTING.md for the community

[0xneves]

This link is an example of how to build a guideline for contributing to open-source projects.

This is an example of Angular and their standard.

Proposal:

• Write a simple contributing guideline for newcomers to learn how to contribute.
• Submit this file for all web3task repositories as a PR, referring to this issue.

[viniblack]

I believe I can help with this need.

[viniblack]

I've created the first version for the front repository, after it's approved I'll use this as the basis for the other repositories

w3b3d3v/web3task-front/pull/170

[Guboehm]

@viniblack Your PR for the frontend has been approved. We are waiting for the PR of the contract repository and landing page. thanks.

[Guboehm]

New update, @viniblack is making the latest adjustments.

[viniblack]

PR front: https://github.com/w3b3d3v/web3task-front/pull/171 PR contracts: https://github.com/w3b3d3v/web3task-contracts/pull/55 PR landing page: https://github.com/w3b3d3v/web3task-lp/pull/23

[Guboehm]

@viniblack review prs please

[Guboehm]

Done, thanks @viniblack