Implement `SharedArrayBuffer` built-in object

[raskad]

Additional to the implementation of the SharedArrayBuffer built-in object, the corresponding uses in TypedArray should be implemented.

ECMASCript feature The SharedArrayBuffer object is used to represent a generic, fixed-length raw binary data buffer, similar to the ArrayBuffer object, but in a way that they can be used to create views on shared memory. Unlike an ArrayBuffer, a SharedArrayBuffer cannot become detached.

ECMAScript specification MDN documentation

[jedel1043]

Blocked until we implement Agents (reason: CreateSharedByteDataBlock) which are not trivial because we would need to first implement Realms and ExecutionContexts

[Razican]

Blocked until we implement Agents (reason: CreateSharedByteDataBlock) which are not trivial because we would need to first implement Realms and ExecutionContexts

Should we have an issue for implementing an Agent?

[jedel1043]

Should we have an issue for implementing an Agent?

We should instead make a project, I think, because agents depend on execution contexts which depend on realms which depend on refactoring the Context type

[jedel1043]

Uh so I reevaluated this and it should be fine to treat Context as our agent. Anyways, this is not blocked on that, but the implementation is a bit complex because of overlapping atomics of different sizes, so I'll unblock this but mark it as hard.

[raskad]

Implemented in #3384