[EPIC] Good first issues

[jerryshao]

Describe the proposal

This epic issue tracks all the good first issues, anyone can check this epic issue to review all the good first issues.

Task list

https://github.com/apache/gravitino/contribute

[four1er]

I found a treasure! This is my first attempt, I want to finish them one by one, hope I can have this opportunity!

[justinmclean]

@four1er find an issue you want to work and just add a comment saying you want to work on it and someone will assign it to you

[ankur-kalita]

@justinmclean can you please assign this issue to me ?

[justinmclean]

@ankur-kalita Just pick one of the good first issues and say you are working on it.