Twios: add proper cross compiled binary, always fetch latest ref

[BobrImperator]

• Adds new properly cross-compiled binary
• Adds a new 'twios' label and allows to run create-twios job when added/removed.
  this allows for testing the workflow.
• Removes unnecessary volta setup, runs the binary directly instead.
• Makes sure the latest branch changes are fetched when creating and editing post.

closes #2129

[marcoow]

@BobrImperator doesn't seem to work? https://github.com/mainmatter/mainmatter.com/actions/runs/6265427251/job/17014303132?pr=2122

[BobrImperator]

@marcoow It does work, it just attempts to read this Pull request's comment which doesn't have the info.

Here's an actual PR it would work for
#2125

[marcoow]

ok but since the build for this PR fails, I'm not sure what I'm supposed to review – assume we don't want to merge with failing build?

[BobrImperator]

@marcoow The jobs are setup to run only on twios branches, unfortunately i made the mistake of naming this one with twios word in it.

[BobrImperator]

@marcoow see the jobs ran for a renamed PR with the same changes #2129

"create_twios" and "edit_twios" jobs fail here only because they're not meant to be ran here.
In a real scenario "create_twios" would only run on automated, scheduled trigger or workflow_dispatch while the "create-twios" solution is only for testing new program versions.

Also the edit_twios job works correctly here: #2125