feat: add support for arrays

tests/array_basic.test

@@ -0,0 +1,16 @@
+[code]
+foreign fn putchar(c: i32) -> i32;
+
+fn main() -> i32 {
+    let arr: [i32; 3] = [65, 66, 67];
+    putchar(arr[0]);
+    putchar(arr[1]);
+    putchar(arr[2]);
+    return 0;
+}
+
+[expected_return_code]
+0
+
+[expected_output]
+ABC

tests/array_swap.test

@@ -0,0 +1,15 @@
+[code]
+fn swap(a: *i32, b: *i32) {
+    let temp = *a;
+    *a = *b;
+    *b = temp;
+}
+
+fn main() -> i32 {
+    let a = [10, 20];
+    swap(&a[0], &a[1]);
+    return a[0] - a[1]; // 20 - 10 = 10
+}
+
+[expected_return_code]
+10