feat: rewrite programming-challenges CLI (#3)

challenges/is-palindrome/solutions/javascript/function/README.md

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+# is-palindrome/javascript/function
+
+Created by [@Divlo](https://github.com/Divlo) on 9 June 2021.

challenges/is-palindrome/solutions/javascript/function/package.json

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+{
+  "type": "module"
+}

challenges/is-palindrome/solutions/javascript/function/solution.js

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+import readline from 'readline'
+
+const input = []
+const readlineInterface = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout
+})
+readlineInterface.on('line', (value) => {
+  input.push(value)
+})
+readlineInterface.on('close', solution)
+
+function solution() {
+  const string = input[0].replace(/ /g, '').toLowerCase()
+  const isPalindrome = string.split('').reverse().join('') === string
+  console.log(isPalindrome)
+}