Revert "feat: 🙈 Add gitignore"

This reverts commit 88d874bbe0.

Lecture/Exercises/Conversion.cs

@@ -1,16 +0,0 @@
-namespace Lecture.Exercises;
-
-public class Conversion
-{
-    public static int StringToInt(string number)
-    {
-        int res = 0;
-
-        for (int i = 0; i < 6; i++)
-        {
-            res = res * 10 + int.Parse(number[i].ToString());
-        }
-        
-        return res;
-    }
-}