Add documentation for kpack CONTRIBUTORS.md

[jjbustamante]

This Pull Request adds missing files to document CONTRIBUTORS.md file. This files are required as part of the process to migrate kpack into CNB.

See for more details.

Fixes #1135

[codecov-commenter]

Codecov Report

Merging #1149 (4642cb1) into main (bdf7d5a) will increase coverage by 0.01%.
The diff coverage is n/a.

❗ Current head 4642cb1 differs from pull request most recent head 430f763. Consider uploading reports for the commit 430f763 to get more accurate results

@@            Coverage Diff             @@
##             main    #1149      +/-   ##
==========================================
+ Coverage   70.01%   70.03%   +0.01%     
==========================================
  Files         132      132              
  Lines        6677     6671       -6     
==========================================
- Hits         4675     4672       -3     
+ Misses       1573     1570       -3     
  Partials      429      429              

see 3 files with indirect coverage changes

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[chenbh]

Out of curiosity, @jjbustamante when do you want to merge this PR? Just wondering what happens when someone emails security@buildpacks.io between the merger of this PR and the actual handoff of kpack.

[samj1912]

I believe we wanted to keep this PR open and merge it once it moves to the buildpacks-community org.

[jjbustamante]

I just remove SECURITY.md from this PR and I will create another PR with just that file, I think we can then approved and merge this and left open the other one after we move to community org repo

[hone]

@jjbustamante what's the reasoning for having both CONTRIBUTORS.md and CONTRIBUTING.md?

[jjbustamante]

@hone I am pretty sure I followed some guidelines where the CONTRIBUTORS.md was some kind of index, and then the CONTRIBUTING.md. But I can remove it, no problem with that, we don't have it in any other CNB repos I think

[jjbustamante]

@tomkennedy513 are we ok with this PR? can we merge it?