Add ShadowRealm API

[x1unix]

The ECMAScript ShadowRealm API proposal in stable and on stage 3. Can you add it please?

See: https://github.com/tc39/proposal-shadowrealm

[Schweinepriester]

• https://2ality.com/2022/04/shadow-realms.html
• Polyfill: https://github.com/leobalter/shadowrealms-polyfill
• Safari:
  • Shipped in Safari TP 142:

    Enabled Shadow Realms support by default (r290119)

  • And Safari 16:

    Added support for Shadow Realms

• Chrome:
  • https://chromestatus.com/feature/5638053476433920
  • https://bugs.chromium.org/p/v8/issues/detail?id=11989
• Firefox: https://bugzilla.mozilla.org/show_bug.cgi?id=1566145
• Tags for the GitHub search since this issue wasn't showing up for those search terms: ShadowRealms & Shadow

[Schweinepriester]

Temporarily disabled by default in Safari TP 155:

Disabled ShadowRealm for now (the --useShadowRealm flag can enable it) (254483@main)