refactor: rework FRAME codegen

[harrysolovay]

Resolves #901

[tjjfvi]

For all the other codegen, we don't indent the template tags, e.g.

function foo() {
  return `
console.log("Hello World")
`
}

Even though the code is formatted by dprint, it's nice for it to be less adhoc-ly indented before formatting. Can you update frameCodegen.ts to follow this convention?

[harrysolovay]

For all the other codegen, we don't indent the template tags

I think it helps with legibility. Certainly makes it easier for newcomers.

[tjjfvi]

Unlike the rest of our formatting, though, dprint doesn't handle it, and so the indentation can get out of sync with the surrounding code.