chore(release): bump workspace version to 0.1.12

Every crate inherits `workspace.package.version`, so the single edit plus
the refreshed lockfile carries the release. The `v0.1.12` tag is what
triggers the build; release.yml gates the tag against this value, and
`cargo metadata --locked` passes so the build's `--locked` will too.

This is the first release cut on Gitea Actions. v0.1.6 through v0.1.9 were
all cancelled for want of a runner whose label matched anything, so nothing
has ever published from the new forge — `releases/latest` still 404s, which
is exactly why `kigi update` finds nothing today. Ships the link migration
in the previous commit, so the installers and self-updater published here
point at Gitea instead of a GitHub repo that no longer serves them.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Cargo.toml

@@ -76,7 +76,7 @@ members = [
 ]
 
 [workspace.package]
-version = "0.1.11"
+version = "0.1.12"
 edition = "2024"
 license = "Apache-2.0"