feat: add loaders option to register

[angeloashmore]

• Allow users to provide a loaders option to register()

This allows users to remap existing loaders or provide new ones. For example, a user may need to map .graphql files to a text loader.

Example:

require("esbuild-register/dist/node").register({
  target: `node${process.version.slice(1)}`,
  loaders: {
    ".js": "js",
    ".jsx": "jsx",
    ".ts": "ts",
    ".tsx": "tsx",
    ".mjs": "js",
    ".graphql": "text",
  },
});