Update Explicit Resource Management proposal

[zloirock]

Note: This is only built-ins for this proposal, using syntax support requires transpiler support.

• Explicit resource management stage 3 and Async explicit resource management stage 2 proposals:
  • Renamed from "using statement" and splitted into 2 (sync and async) proposals
  • In addition to already present well-known symbols, added new built-ins:
    • Symbol.dispose
    • Symbol.asyncDispose
    • SuppressedError
    • DisposableStack
      • DisposableStack.prototype.dispose
      • DisposableStack.prototype.use
      • DisposableStack.prototype.adopt
      • DisposableStack.prototype.defer
      • DisposableStack.prototype.move
      • DisposableStack.prototype[@@dispose]
    • AsyncDisposableStack
      • AsyncDisposableStack.prototype.disposeAsync
      • AsyncDisposableStack.prototype.use
      • AsyncDisposableStack.prototype.adopt
      • AsyncDisposableStack.prototype.defer
      • AsyncDisposableStack.prototype.move
      • AsyncDisposableStack.prototype[@@asyncDispose]
    • Iterator.prototype[@@dispose]
    • AsyncIterator.prototype[@@asyncDispose]
  • Sync version of this proposal moved to Stage 3, November 2022 TC39 meeting
  • Added /actual/ namespace entries for stage 3 proposal

cc @rbuckton