* feat(update): update Bun global installations
`rea update` only recognized npm global installations and looked up
releases with `npm view`, so a `bun add --global rea-agents` install on a
machine without npm failed with `spawn npm ENOENT`.
Detect the running package inside Bun's global directory
(BUN_INSTALL_GLOBAL_DIR, $BUN_INSTALL/install/global,
$XDG_CACHE_HOME/.bun/install/global, ~/.bun/install/global), resolve the
latest release with `bun info`, install with
`bun add --global --ignore-scripts`, then verify the installed entry point
and plan integration maintenance exactly as for npm.
Bun commands run inside the owning global directory with
BUN_INSTALL_GLOBAL_DIR pinned, so the caller's current project is never
selected. A global directory without package.json is not treated as an
owned installation: Bun then installs into the nearest ancestor project.
npm installations keep their existing commands and messages.
* fix(update): gate Bun self-updates on supported CLI versions
---------
Co-authored-by: morluto <76467478+morluto@users.noreply.github.com>
