Add BCR workflow for Bazel Central Registry publishing

[mmorel-35]

Description

Provide the workflow to publish the new versions of the Bazel module

Based on https://github.com/bazelbuild/bazel-central-registry/tree/main/modules/fast_float

https://github.com/bazel-contrib/publish-to-bcr/tree/main?tab=readme-ov-file#setup

[mmorel-35]

/cc @BYVoid

[lemire]

As such, this will not work, of course.

[mmorel-35]

That's based on @BYVoid work in BCR.

Can you provide some guidance to make this work ?

[lemire]

@mmorel-35

That's based on @BYVoid work in BCR. Can you provide some guidance to make this work ?

This will not work because your configuration requires a secret token: BCR_PUBLISH_TOKEN. If you have this secret token, you can communicate with me privately and share it with me, and I can add it to the repo.

[lemire]

@LeszekSwirski can you review this ?