bunfig: preload does not resolve parent-relative paths

[DonIsaac]

What version of Bun is running?

1.1.43-debug+caa6a7c5a

What platform is your computer?

Darwin 24.1.0 arm64 arm

What steps can reproduce the bug?

Paths to preload files in parent directories are not resolved from bunfig.toml's directory (if at all).

[test]
preload = "../preload.ts"

This tarball contains a repo with a minimal reproduction.
bunfig-preload.tar.gz

What is the expected behavior?

All files are preloaded

What do you see instead?

Additional information

No response

[DonIsaac]

When fixed, please move bunfig.node-test.toml back to test/js/node/bunfig.toml and update runner.node.mjs to point to it.