misc: add benchmarking script for edge rendering

[feedthejim]

This PR adds the benchmarking script I've been using for #40251 to measure the performance improvements that we make to the Edge SSR runtime.

This tool:

• uploads two version of the benchmarking project to Vercel, one with the latest canary and the one with your current local changes in dist (don't forget to build!)
• runs some tests against the published url to measure TTFB
• displays a nice chart and table

What this doesn't do (yet):

• allow you to choose which URL to compare
• allow you to change the measured metric

Bug

• [ ] Related issues linked using fixes #number
• [ ] Integration tests added
• [ ] Errors have a helpful link attached, see contributing.md

Feature

• [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
• [ ] Related issues linked using fixes #number
• [ ] Integration tests added
• [ ] Documentation added
• [ ] Telemetry added. In case of a feature if it's used or not.
• [ ] Errors have a helpful link attached, see contributing.md

https://user-images.githubusercontent.com/11064311/191270204-04447e20-5a40-43a9-bcda-b7eaeb3d270a.mov

Documentation / Examples

• [ ] Make sure the linting passes by running pnpm lint
• [ ] The "examples guidelines" are followed from our contributing doc