The `Installation.isLocal()` gate in dev-setup rejected locally-built
binaries because KILO_CHANNEL bakes the git branch name, not "local".
`detectRepo()` also failed inside a Bun single-file executable where
`import.meta.url` resolves to a `/$bunfs/` virtual path.
Introduce a build-time `KILO_BUILD_KIND` flag (source/release) derived
from `Script.release`, guard dev-setup/dev-alias registration on it,
and rewrite `detectRepo()` to try KILO_DEV_REPO, `import.meta.url`
(skipping bunfs), `process.execPath`, then `process.cwd()`.
Catriel Müller