[DOCS] add contributing file

[MrPowers]

Did you read the Contributor Guide?

• Yes, I have read the Contributor Rules and Contributor Development Guide

Is this PR related to a JIRA ticket?

Fixes #1728.

What changes were proposed in this PR?

Adds a CONTRIBUTING file, as recommended by GitHub.

How was this patch tested?

N/A.

Did this PR include necessary documentation updates?

• No, this PR does not affect any public API so no need to change the documentation.

[jiayuasu]

@MrPowers can you run pre-commit run --all-files locally to fix the lint issue?

[james-willis]

Are you duplicating the contents here? https://sedona.apache.org/latest/community/contact/

Some of the contents contradict what is present there as well.

[MrPowers]

@jiayuasu - I ran that command and pushed up the fix, thank you!

@james-willis - I tried my best to make them consistent, but perhaps need to make some tweaks. I just took another look and nothing jumped out. Anything in particular you think I should update? Thanks for reviewing!

[james-willis]

I think im objecting to the "Did you create a PR to fix a bug?" section. I think you need to just fill out the template, not write in the description which issues youre addressing. Issue ID will go in the title in brackets at the start.

[MrPowers]

@james-willis - I updated that section, let me know if it looks better now. Thanks for reviewing!