Add GitHub bot for performance regression/progression testing

[suneettipirneni]

Feature

A lot of times we aren’t always immediately aware of the certain impacts some commits have on performance. We should have a performance suite that can be manually triggered on pull requests via a bot.

Ideal solution or implementation

Taking inspirations from the typescript GitHub repo, we would create a bot that can run various sets of performance suites. This bot would be able to be triggered by anyone in the djs team. Once testing finishes the bot will comment on the PR letting us know the quantitative performance difference

Alternative solutions or implementations

Use a GitHub action, but this is much less flexible since you can’t pick specific suites, and it’s somewhat unneeded in PR’s that don’t effect performance like typings PR’s.

Other context

An example of this in the typescript repo:

microsoft/TypeScript#47109 (comment)