chore: remove npm-run-all usage

[MichaelDeBoey]

This upgrades from npm-run-all to npm-run-all2. Primarily because the latter is actively maintained, has security updates and a reduced footprint in the dependency tree.

I'm sure people from the wider @e18e ecosystem cleanup (like @43081j) will be very happy to see these kind of changes as well

This package isn't used by any of the code, so it can be removed

[changeset-bot]

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Latest commit: cc9c0cf

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[outslept]

Hey, I found that the npm-run-all dependency might be unnecessary:

• Searching for "npm-run-all" returns 0 results in the codebase (except the actual package in package.json's dependency field)
• The only mentions of "run-s" and "run-p" are in an old changelog (v1.16.0), where they were already removed in a diff:

  {
    // ...
    "scripts": {
  -    "build": "run-s \"build:*\"",
  +    "build": "remix build",
  -    "build:css": "npm run generate:css -- --minify",
  -    "build:remix": "remix build",
  -    "dev": "run-p \"dev:*\"",
  +    "dev": "remix dev",
  -    "dev:css": "npm run generate:css -- --watch",
  -    "dev:remix": "remix dev",
  -    "generate:css": "npx tailwindcss -o ./app/tailwind.css",
      "start": "remix-serve build"
    }
    // ...
  }

Can we safely remove this dependency since it's not being used anywhere?

Source (L1921 & L1925):

react-router/packages/react-router-dev/CHANGELOG.md

Line 1921 in c06ec85

- "build": "run-s \"build:*\"",