fix(utils): replace vim.fn.glob with vim.uv.fs_scandir to fix checkhealth hang

[asielcabrera]

Closes #2 — the actual root cause identified by live testing in Neovim.

Problem

checkhealth swift was hanging at the Project Detection section with a Keyboard Interrupt. The culprit was vim.fn.glob() inside find_pattern_upwards() in utils.lua.

vim.fn.glob() calls the OS readdir() + shell glob expansion synchronously, blocking Neovim's main thread. On macOS, when the current directory tree contains many files (e.g. your home folder or an NFS mount), this can freeze Neovim indefinitely.

Fix

Replaced vim.fn.glob() with vim.uv.fs_scandir() (libuv's native directory scanner) for suffix-based patterns like *.xcworkspace and *.xcodeproj. Also adds a max_depth = 10 guard so the search never walks all the way to /.

Benchmark (headless Neovim, tested locally)

detect_xcode_workspace (find_pattern_upwards *.xcworkspace)   1ms ✅
detect_xcode_project   (find_pattern_upwards *.xcodeproj)     0ms ✅

Also includes

• A speed test script tests/test_health_speed.lua to catch regressions