Feature request: tc39 Explicit Resource Management

[rictic]

This could be broken out into multiple features:

• Symbol.dispose
• Symbol.asyncDispose
• using syntax
• await using syntax
• DisposableStack
• AsyncDisposableStack

Spec: https://github.com/tc39/proposal-explicit-resource-management

Looks like Chrome is shipping Symbol.dispose, but no one is shipping anything else.

[Schweinepriester]

At least related to #6830, if not duplicate, but that one could be argued as a subset of this one.