Metrics for custom threat rules

[JustHumanz]

Summary

Add metrics for custom threat rules #232

Proposed of changes

This PR fixes/implements the following bugs/features:

• Update Metrics feature (fix [FEATURE] metrics for custom threat rules #232)

How has this been tested?

Proof:

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
  • I have updated the documentation accordingly.
• I have followed the guidelines in our CONTRIBUTING.md document.
• I have written new tests for my changes.
  • My changes successfully ran and pass tests locally.

[dwisiswant0]

This is neat, @JustHumanz! Before that, I have some concerns such as code-style, workable improvisation, and expression implementation questions below.

[dwisiswant0]

All good now! Thanks for your contributions, @JustHumanz.

[dwisiswant0]

@all-contributors add @JustHumanz for accessibility.

[allcontributors]

@dwisiswant0

I've put up a pull request to add @JustHumanz! 🎉