Adding Performance Checklist to site

[sekyondaMeta]

Adding performance checklist to site. Quick first run at the checklist.
Plan to add this checklist to FAQs page in the future as well. For now, it can be accessed through the performance page.

Fixes #(issue)
Adds to performance information

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Feature/Issue validation/testing

Built pages locally to ensure they work.

Checklist:

• Did you have fun?
• Have you added tests that prove your fix is effective or that this feature works?
• Has code been commented, particularly in hard-to-understand areas?
• Have you made corresponding changes to the documentation?

[codecov]

Codecov Report

Merging #2526 (79d6da1) into master (1a61d2c) will increase coverage by 0.08%.
The diff coverage is n/a.

❗ Current head 79d6da1 differs from pull request most recent head 4f3a7ab. Consider uploading reports for the commit 4f3a7ab to get more accurate results

@@            Coverage Diff             @@
##           master    #2526      +/-   ##
==========================================
+ Coverage   72.56%   72.64%   +0.08%     
==========================================
  Files          79       79              
  Lines        3733     3733              
  Branches       58       58              
==========================================
+ Hits         2709     2712       +3     
+ Misses       1020     1017       -3     
  Partials        4        4              

see 1 file with indirect coverage changes

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[msaroufim]

see comments inline

[sekyondaMeta]

Made the updates