Replaces the inner test script with an outer driver that runs individual
podman/docker commands against a pre-built image. Tests sqlite-vec
loading and store unit tests under both node and bun runtimes.
Supports --build (image only), --shell (interactive), and -- CMD
(arbitrary command) for debugging install issues in isolation.
The qmd bin was a custom bash script that discovered node via hardcoded
fallback paths (mise, asdf, nvm, homebrew). This was nonstandard and
caused ABI mismatches when installed via bun (native modules compiled
for bun but executed with node).
Now uses the standard npm bin convention: dist/qmd.js with a node
shebang, added by the build script. The isMain guard resolves symlinks
so it works when npm/bun create symlinked bin entries.
Also converts all dynamic require() calls in tests to ESM imports, and
adds container-based smoke tests (test/smoke-install.sh) that verify
install + run under both node and bun via mise in a Debian container.
