It's still up to the user to decide which approach to use.

Add CI matrix for Swift 6.1

use-sites still can fallback to other task executors, so it should be a
recoverable error rather than a fatal error.

Throw error if the worker thread creation fails

Introduce BridgeJS, a declarative JS interop system

Some apps wrap instance.exports and monitor
exceptions thrown during execution of Wasm program
but `UnsafeEventLoopYield` is not something they
want to report, so they need to be able to filter them
out. However, they cannot use `UnsafeEventLoopYield` type
name because some bundlers can rename it.
We should export it to allow them not to depend on the
constructor name

Export `UnsafeEventLoopYield` error type

…erty

Expose UnsafeEventLoopYield by property