v0.1.4 - same game as v0.1.3, with release tooling

Gameplay is identical to v0.1.4's predecessor - every logic, tracker and
generation fix shipped in v0.1.3. This release exists so the published artifacts
match main exactly.

What is new is all release plumbing:

• CI fails any push where the version has already shipped, so drift is caught on
  the push that causes it rather than at the next release. v0.1.1 and v0.1.2
  both drifted for days without anything noticing.
• Publishing a release now bumps the version automatically.
• The plugin logs the commit it was built from, so a released build and a local
  one that share a version number can be told apart from the log.

Use the mod, apworld and yaml from THIS release together.

Install: docs/installation.md