ci: 8253 - Add fitness function action for enzyme imports

[Cal-L]

Description

These changes introduces a fitness function in the form of a Github action. Currently, it is only used to prevent any new enzyme imports but can be extended to check for other things moving forward. Mostly copied over from extension:
https://github.com/MetaMask/metamask-extension/blob/develop/.github/workflows/fitness-functions.yml
https://github.com/MetaMask/metamask-extension/blob/develop/development/fitness-functions/index.ts
https://github.com/MetaMask/metamask-extension/blob/develop/development/fitness-functions/rules/sinon-assert-syntax.ts
Credits to @pedronfigueiredo

TODO: Follow up with team to identify where GH action READMEs belong

Related issues

Fixes:

Manual testing steps

1. Go to this page...

Screenshots/Recordings

Before

After

Pass without new enzyme usage
https://github.com/MetaMask/metamask-mobile/assets/10508597/b62eccd1-dc7b-4e01-8a88-73240fea77cb

Fail with new enzyme import
https://github.com/MetaMask/metamask-mobile/assets/10508597/063d6acb-b48f-4ae7-964c-922e8c931fff

Pre-merge author checklist

• I’ve followed MetaMask Coding Standards.
• I've clearly explained what problem this PR is solving and how it is solved.
• I've linked related issues
• I've included manual testing steps
• I've included screenshots/recordings if applicable
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.
• I’ve properly set the pull request status:
  • In case it's not yet "ready for review", I've set it to "draft".
  • In case it's "ready for review", I've changed it from "draft" to "non-draft".

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 41.60%. Comparing base (c575f53) to head (82326b2).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8789   +/-   ##
=======================================
  Coverage   41.60%   41.60%           
=======================================
  Files        1269     1269           
  Lines       30859    30859           
  Branches     3082     3082           
=======================================
  Hits        12840    12840           
  Misses      17243    17243           
  Partials      776      776           

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[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud

[NicolasMassart]

Looks good to me.
In a future iteration I wish we could have these externalised in a GH action though.