Resource usage guidelines for GBDev community members

Issue description from the [March 2024 Steering Committee meeting minutes file](https://gbdev.io/meetings/2024-03-10-sc2.html):
> Promoting usage of public domain/creative commons/”use as long as you give credit” assets among community members

The main goal of creating a separate page for this was decided to be used for whenever a project relevant to Game Boy development uses publicly available assets without accounting their usage guidelines (or lack thereof), specifically to link it to the person behind such project for future reference, though it might be useful to make it a publicly accessible page just in case.

Ideas for what this page might contain:
- simple explanation of the importance of checking up on how to use assets before using them?
- short introduction to Creative Commons licenses with link to the organization's website?
- examples of assets usage dos and don'ts?