fix(js): test on node 20-22; format TS with biomejs #1987 #1995

[yesudeep]

fix(js): test on node 20-22; format TS with biomejs #1987 #1995

This speeds up formatting by 4-12x and fixes several formatting related
issues whether they have to do with the commit message, source code, or
license headers. This means faster CI and pre-commits.

Also updates GitHub actions configuration to run tests for these node
versions:

• 20
• 21
• 22
• 23 (temporarily disabled since it is failing [JS] Tests fail with node 23. #1995)

ISSUE: #1987
ISSUE: #1995

CHANGELOG:

• Update pnpm run format to use biomejs
• Update pnpm run format:check to use biomejs
• Use bin/add_license to add license headers.
• Exclude the py/ and go/ runtimes from the formatter.
• Fix Import attributes cannot be used with a type-only import error
• Update all the TypeScript files to use Google-style formatting.
• Re-enable pre-commit formatting for TypeScript.
• Update the JavaScript GitHub action workflows so that JS
  tests run on node version 20-23.
• Update bin/setup to default to node 22.

BENCHMARKS:

zsh❯ hyperfine -i "pnpm run format:biome" "pnpm run format:prettier"
Benchmark 1: pnpm run format:biome
  Time (mean ± σ):     453.6 ms ±   5.6 ms    [User: 679.3 ms, System: 92.5 ms]
  Range (min … max):   447.9 ms … 465.3 ms    10 runs

  Warning: Ignoring non-zero exit code.

Benchmark 2: pnpm run format:prettier
  Time (mean ± σ):      5.715 s ±  0.285 s    [User: 9.578 s, System: 0.739 s]
  Range (min … max):    5.506 s …  6.426 s    10 runs

Summary
  pnpm run format:biome ran
   12.60 ± 0.65 times faster than pnpm run format:prettier

A sample run follows:

zsh❯ pnpm run format

> genkit@ format /Users/yesudeep/code/github.com/firebase/genkit
> pnpm dlx @biomejs/biome format --write . && (tsx scripts/copyright.ts)

Formatted 663 files in 86ms. Fixed 217 files.
Checking copyright in sources...
Updated copyright headers in 0 files

REFERENCES:

The configuration for the formatting is more or less based on the Google
TypeScript formatting guidelines at:

• https://google.github.io/styleguide/tsguide.html#string-literals
• https://google.github.io/styleguide/jsguide.html
• https://google.github.io/styleguide/tsguide.html#arrow-function-bodies
• https://google.github.io/styleguide/tsguide.html#automatic-semicolon-insertion

Checklist (if applicable):

• PR title is following https://www.conventionalcommits.org/en/v1.0.0/
• Tested (manually, unit tested, etc.)
• Docs updated (updated docs or a docs bug required)