Misc: Generate and push repros to a GitHub repo every night

[gaetanmaisse]

What I did

Added a script to generate and push repros every night. It is using

• sb repro from the Storybook CLI
• zx, I discovered it a few weeks (months?) ago and had the opportunity to use it for non-trivial script and I find it really pleasant to use, it simplifies a lot the syntax when writing JS scripts. It could be a great lib to replace all the cross-spawn, spawn etc usages and our custom exec functions we have in the CLI and in the tooling scripts. To discuss with other maintainers 😄

TODO

• Update the READMEs
• Update the GH user used in the GH Action + generate a PAT for Storybook Bot and update the PAT_STORYBOOK_BOT secret of this repository
• Make the repo public
• Add links in the doc? website?

How to test

• A GitHub action called Generate And Push Repros should have run without any error: https://github.com/storybookjs/storybook/pull/15877/checks?check_run_id=3393520779
• Repository with all the repros should have been updated: https://github.com/storybookjs/repro-templates

[nx-cloud]

Nx Cloud Report

CI ran the following commands for commit 582e70a. Click to see the status, the terminal output, and the build insights.

📂 See all runs for this branch

Status	Command
	nx run-many --target=prepare --all --parallel --max-parallel=15

---

Sent with 💌 from NxCloud.

[shilman]

LGTM! great stuff as usual @gaetanmaisse 🚀