Improve glob handling for folders with (, ), [ or ] in the file path

[RobinMalfait]

This PR fixes an issue where we assumed that (, ), [ and ] were already properly escaped. This wasn't the case, let's fix it.

This is also going to be a nice DX improvement for people using file based routers where the files and folders can contain any of the following characters: ()[]

In this PR, we will make sure to escape those characters, and we will also ensure that we don't double escape them if you already escaped them yourselfs. This means that the following 2 snippets will be equivalent:

/** @type {import\('tailwindcss').Config} */
module.exports = {
  content: [
    "./src/1.html",
    "./src/(test)/2.html",
    "./src/[test]/3.html",
    "./src/[test]/(test)/4.html",
    "./src/*/(test)/4.html",
  ],
  theme: {
    extend: {},
  },
  plugins: [],
};

/** @type {import\('tailwindcss').Config} */
module.exports = {
  content: [
    "./src/1.html",
    "./src/\\(test\\)/2.html",
    "./src/\\[test\\]/3.html",
    "./src/\\[test\\]/\\(test\\)/4.html",
    "./src/*/\\(test\\)/4.html",
  ],
  theme: {
    extend: {},
  },
  plugins: [],
};

Fixes: #12708