feat(cli): add --quiet / -q option

Stops any successful output. Errors are still outputted.

README.md

@@ -69,6 +69,15 @@ $ sort-package-json "**/package.json" --check
 # 2 of 5 matched files are not sorted.
 ```
 
+#### `--quiet` flag
+
+In order to silence any successful output, you can run CLI with the `--quiet` flag (or `-q`). This will stop the CLI from outputting if it runs successfully, but will still display errors if they occur. Exit codes will not change.
+
+```bash
+$ sort-package-json "**/package.json" --check --quiet
+$ sort-package-json "**/package.json" --quiet
+```
+
 ## API
 
 ### Install
@@ -137,7 +146,7 @@ If an array, sort keys in ordering of `options.sortOrder`.
 
 ```js
 const sorted = sortPackageJson(packageJsonObject, {
- sortOrder: ['version']
+ sortOrder: ['version'],
 })
 
 console.log(Object.keys(sorted))
@@ -153,7 +162,7 @@ If a function, sort fields by [Array#sort(options.sortOrder)](https://developer.
 const sorted = sortPackageJson(packageJsonObject, {
  sortOrder(left, right) {
  return left.localeCompare(right)
- }
+ },
 })
 
 console.log(Object.keys(sorted))
@@ -235,4 +244,3 @@ A lot of people who ask for configuration cite the use case that they simply don
 ### What?! Why would you want to do this?!
 
 Well, it's nice to have the keys of a package.json in a well sorted order. Almost everyone would agree having "name" at the top of a package.json is sensible (rather than sorted alphabetically or somewhere silly like the bottom), so why not the rest of the package.json?
-

cli.js

@@ -1,12 +1,14 @@
 #!/usr/bin/env node
-import fs from 'node:fs'
 import { globbySync } from 'globby'
+import fs from 'node:fs'
 import sortPackageJson from './index.js'
 
 const isCheckFlag = (argument) => argument === '--check' || argument === '-c'
+const isQuietFlag = (argument) => argument === '--quiet' || argument === '-q'
 
 const cliArguments = process.argv.slice(2)
 const isCheck = cliArguments.some(isCheckFlag)
+const isQuiet = cliArguments.some(isQuietFlag)
 
 const patterns = cliArguments.filter((argument) => !isCheckFlag(argument))
 
@@ -21,6 +23,8 @@ if (files.length === 0) {
  process.exit(1)
 }
 
+if (isQuiet) console.log = function () {}
+
 let notSortedFiles = 0
 
 files.forEach((file) => {