Add dkonchekov's file list cli params

[poita66]

This PR adds dkonchekov's changes to support specifying the files to be checked, instead of the whole folder.
This is especially useful for pre-commit hooks, where you don't want all of the files checked, just those that have changed.

For those looking to set up their own pre-commit hooks, here's what I added to my package.json:

"husky": {
  "hooks": {
    "pre-commit": "lint-staged"
  }
},
"lint-staged": {
  "src/**/*.{js,ts,vue}": "eslint --cache --fix",
  "src/**/*.vue": "vue-type-check --onlyTemplate --workspace ."
}

[poita66]

@dkonchekov I hope it's OK that I put this PR together, I couldn't figure out how to ask you first 😅

[caugner]

It would probably be better to read the file asynchronously:

Suggested change

	fs.readFileSync(file, "utf8")
	await fs.readFile(file, "utf8")

Also, this block should better be extracted to an async function enumerate, just like traverse.

[caugner]

Wouldn't it be possible to reuse cwd for this?

Suggested change

	workspace: path.resolve(cwd, workspace || "."),
	workspace: path.resolve(cwd, workspace || cwd),

It would be more readable to keep the !workspace block, but move it after the cwd assignment:

const cwd = process.cwd();

if (!workspace) {
  workspace = cwd;
}

[caugner]

Is that really necessary?