A tagged-template version of select.

Format:

import {Channel} from "../channel.ts";
import {select} from "./select.ts";
const ch1 = new Channel();
const ch2 = new Channel();
const res = await select`
  case ${ch1}: ${(val) => "Will be called if ch1 was sent val"}
  case ${[ch2, "val"]}: ${() => "Will be called if ch2 accepted 'val'"}
  default: ${() => "Will be called if no other channel is ready for get / send"}
`
console.log(res)