[FEATURE]: auto-cleanup of large cached legacy opencode binaries #24255

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

in case of execute this command du -ch ~/.bun/install/cache/opencode-*; my opencode legacy version take my disk usage over ~15GB.

is that possible to have auto clean-up legacy binaries, or this just bun javascript issues, idk; because i use bun javascript runtime as my default runtime.

thank you.