Prevent #1688 (and other accidental prettier breakages)

[NullVoxPopuli]

Fixes: #1688

This repo is going through a lot of infra changes, so because we haven't had any integration tests with prettier (since they consume @glimmer/syntax for hbs and glimmer parsing), we've accidentally broke them now 2 or 3 times recently 😬

Takes the same approach as:

• Add smoke-tests for types, build, etc  emberjs/data#9633

Where we use our real build in a real project outside the monorepo.
Every shortcut we take to make in-repo development easier needs to have extra testing to ensure we don't mess up publishing.

Both ember-data/warp-drive and glimmer-vm are not testing the code they ship to NPM.

---

In debugging, I copied the prod index.js and formatted it with prettier so that I could debug it:

function P(t) {
  return t.length > 0;
}

via:

console.log((await import('./syntax-prod.js')).preprocess('<h1></h1>'));

and the VS Code JavaScript Debug Terminal

[NullVoxPopuli]

is draft, because I've yet to reproduce the situation created by #1688

[github-actions]

	This PR	main
Dev	582K └─┬ . 169K ├── runtime 159K ├── syntax 100K ├── compiler 58K ├── opcode-compiler 27K ├── manager 19K ├── validator 11K ├── program 8.9K ├── reference 7.2K ├── destroyable 6.3K ├── util 4.3K ├── node 3.4K ├── global-context 2.5K ├── wire-format 1.0K ├── vm 969B ├── encoder 844B ├── vm-babel-plugins 606B └── owner	582K └─┬ . 169K ├── runtime 159K ├── syntax 100K ├── compiler 58K ├── opcode-compiler 27K ├── manager 19K ├── validator 11K ├── program 8.9K ├── reference 7.2K ├── destroyable 6.3K ├── util 4.3K ├── node 3.4K ├── global-context 2.5K ├── wire-format 1.0K ├── vm 969B ├── encoder 844B ├── vm-babel-plugins 606B └── owner
Prod	230K └─┬ . 69K ├── syntax 63K ├── runtime 48K ├── compiler 18K ├── opcode-compiler 7.9K ├── manager 4.8K ├── program 4.0K ├── validator 3.6K ├── reference 2.4K ├── util 2.1K ├── node 1.6K ├── wire-format 1.5K ├── destroyable 737B ├── vm 594B ├── global-context 516B ├── encoder 469B ├── vm-babel-plugins 155B └── owner	230K └─┬ . 69K ├── syntax 63K ├── runtime 48K ├── compiler 18K ├── opcode-compiler 7.9K ├── manager 4.8K ├── program 4.0K ├── validator 3.6K ├── reference 2.4K ├── util 2.1K ├── node 1.6K ├── wire-format 1.5K ├── destroyable 737B ├── vm 594B ├── global-context 516B ├── encoder 469B ├── vm-babel-plugins 155B └── owner

[NullVoxPopuli]

nothing was calling test:node prior to this PR, and run-node-tests called global ember, which isn't used in CI

[wycats]

Love having formal prettier tests.

[wycats]

Hm... what uses isPresentArray with an optional array?

[NullVoxPopuli]

nothing -- it's a minification bug!

input:

  private matchFor(
    left: OffsetKind,
    right: OffsetKind
  ): (left: PositionData, right: PositionData) => Out {
    const nesteds = this._whens.match(left);

    localAssert(
      isPresentArray(nesteds),
      `no match defined for (${left}, ${right}) and no AnyMatch defined either`
    );

    const callback = new WhenList(nesteds).first(right);

    localAssert(
      callback !== null,
      `no match defined for (${left}, ${right}) and no AnyMatch defined either`
    );

    return callback;
  }

output:

 matchFor(t, e) {
    const s = this._whens.match(t);
    return P(), new I(s).first(e);
  }