feat: rewrite programming-challenges CLI (#3)

templates/solution/typescript/solution.ts

@@ -0,0 +1,15 @@
+import readline from 'readline'
+
+const input: string[] = []
+const readlineInterface = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout
+})
+readlineInterface.on('line', (value) => {
+  input.push(value)
+})
+readlineInterface.on('close', solution)
+
+function solution(): void {
+  console.log(`Hello, ${input[0]}!`)
+}