Loads build/wasthon-full.{mjs,wasm} exactly once and installs
all 22 wasthon modules. Runs at least one smoke check per module to verify
they cohabit in a single WASM instance — no symbol collisions, no shared
state leakage across upstream libraries (HACL crypto, zlib, bzip2, xz,
zstd, libexpat, libmpdec, plus pure-CPython numerics, parsing, regex,
containers).