Add another RE implementation?

### Description of the feature request:

Long time no see! What do you think about adding [my implementation](https://github.com/excitoon/buildpot) of remote execution to the official list here: https://bazel.build/community/remote-execution-services?

It works under Windows NT 3.1 and allows to build code on Visual C++ 1.0 :grin:.


### Which category does this issue belong to?

Documentation

### What underlying problem are you trying to solve with this feature?

No actual problem, it's purely optional.

### Which operating system are you running Bazel on?

OS X

### What is the output of `bazel info release`?

_No response_

### If `bazel info release` returns `development version` or `(@non-git)`, tell us how you built Bazel.

_No response_

### What's the output of `git remote get-url origin; git rev-parse HEAD` ?

```text

```

### Have you found anything relevant by searching the web?

_No response_

### Any other information, logs, or outputs that you want to share?

_No response_

Start at the remote-execution services page linked in the issue and inspect how existing implementations are listed. Add buildpot with the information needed for an official entry, then verify that it appears correctly on the page and accurately links to the project.

Written by the indexing model from the issue text.