eqz: Wasm text instruction

(module
  (import "env" "log_bool" (func $log_bool (param i32)))
  (func $main
    ;; load `0` onto the stack
    i32.const 0

    i32.eqz ;; check if the previous number on the stack is equal to 0
    call $log_bool ;; log the result
  )
  (start $main)
)

const url = "{%wasm-url%}";

function log_bool(value) {
  console.log(Boolean(value));
  // Expected output: false
}

await WebAssembly.instantiateStreaming(fetch(url), {
  env: { log_bool },
});