string example

examples/strings.zr

@@ -0,0 +1,12 @@
+func print_i64[x: I64] : I64
+    printf("%ld\n", x)
+
+func i64_to_string[n: I64] : String
+    let x: I64 = malloc(21)
+    sprintf(x, "%d", n)
+    return x
+
+func main[] : I64
+    let s: String = i64_to_string(58394)
+    print_i64(strlen(s))
+    free(s)