chore: Add .flox/ as generated by flox init for https://flox.dev (Nix) [skip changelog]

[vorburger]

As a #DevEnv, to make it easy to Build from Source. e.g. on (current!) Fedora 41 which still has Go 1.23 instead of 1.24.

See https://flox.dev

Ran into this while trying to locally further debug #10762 myself, but couldn't even get it to build, at first.

Please update docs/changelogs/ if you're modifying Go files. If your change does not require a changelog entry, please do one of the following: - add `` to the PR title

Done!

• label the PR with skip/changelog

I don't appear to have the permission to do that on this repo - can I get it?

[lidel]

@vorburger thank you for submitting this. Unfortunately we can't accept this PR.

Rationale:

• Our policy is to not include any editor / IDE specific code / package manager-speciifc code, as maintenance cost is taking limited time maintainers have away from working on bugfixes and features.
• Files you introduce in this PR are specific to SaaS(?) startup/business at https://flox.dev and require maintenance. Nobody on the team is using https://flox.dev – without additional CI workflow that confirms these things work, it will get out of date as soon new golang is released. This is adding unnecessary noise/work.
• If you want to create packages for local dev with specific editor/IDE or Linux distribution, follow what others did, and do that in your own repository:
  • https://github.com/ipfs/kubo#unofficial-linux-packages