Add and implement websocket API

[afsalthaj]

No description provided.

[blacksmith-sh]

Found 32 test failures on Blacksmith runners:

Failures

Test	View Logs
subtest sync throw fail/+sync throw fail	View Logs
subtest sync throw fail/+sync throw fail	View Logs
subtest sync throw fail/+sync throw fail	View Logs
subtest sync throw fail/+sync throw fail	View Logs
subtest sync throw fail/+sync throw fail	View Logs
subtest sync throw fail/+sync throw fail	View Logs
subtest sync throw fail/+sync throw fail	View Logs
subtest sync throw fail/+sync throw fail	View Logs
subtest sync throw fails/sync throw fails at first	View Logs
subtest sync throw fails/sync throw fails at first	View Logs
subtest sync throw fails/sync throw fails at first	View Logs
subtest sync throw fails/sync throw fails at first	View Logs
subtest sync throw fails/sync throw fails at first	View Logs
subtest sync throw fails/sync throw fails at first	View Logs
subtest sync throw fails/sync throw fails at first	View Logs
subtest sync throw fails/sync throw fails at first	View Logs
subtest sync throw fails/sync throw fails at second	View Logs
subtest sync throw fails/sync throw fails at second	View Logs
subtest sync throw fails/sync throw fails at second	View Logs
subtest sync throw fails/sync throw fails at second	View Logs
subtest sync throw fails/sync throw fails at second	View Logs
subtest sync throw fails/sync throw fails at second	View Logs
subtest sync throw fails/sync throw fails at second	View Logs
subtest sync throw fails/sync throw fails at second	View Logs
top level/+long running	View Logs
top level/+long running	View Logs
top level/+long running	View Logs
top level/+long running	View Logs
top level/+long running	View Logs
top level/+long running	View Logs
top level/+long running	View Logs
top level/+long running	View Logs

[vigoo]

Few general remarks:

• let's have https://developer.mozilla.org/en-US/docs/Web/API/WebSocketStream as well
• make sure they are reexported from node:http
• check if there are vendored node.js tests we can enable