feat: cria algoritmo que retorne a a letra mias repetida de uma string.

09-mostRepeatedChar/index.js

@@ -1,4 +1,17 @@
 export function mostUsedChar(text) {
     // implementar logica aqui
-    return ""
+    let char = '';
+    let repeatLetter = 0;
+    for (const character of text) {
+        let countLetter = 0;
+        for (const verifyCharacter of text) {
+            if (character === verifyCharacter)
+                countLetter++
+        }
+        if (countLetter > repeatLetter) {
+            repeatLetter = countLetter;
+            char = character
+        }
+    }
+    return char;
 }