Semi-implemented foreach for vectors (#423)

Implement foreach for vectors

src/compiler/llvm_codegen_expr.c

@@ -2200,6 +2200,7 @@ void llvm_emit_len_for_expr(GenContext *c, BEValue *be_value, BEValue *expr_to_l
 			}
 			break;
 		case TYPE_ARRAY:
+		case TYPE_VECTOR:
 			llvm_value_set(be_value, llvm_const_int(c, type_usize, expr_to_len->type->array.len), type_usize);
 			break;
 		default:

test/test_suite/statements/foreach_common.c3t

@@ -6,6 +6,7 @@ extern fn void printf(char*, ...);
 fn void main()
 {
     float[3] foo = { 2, 4.5, 8 };
+    float[<3>] foo2 = { 2, 4.5, 8 };
     foreach (a : foo)
     {
         printf("Value: %f\n", a);
@@ -31,6 +32,23 @@ fn void main()
     {
         printf("Value3: %f\n", a);
     }
+
+    foreach (a : foo2)
+    {
+        printf("Value: %f\n", a);
+    }
+    foreach (i, a : foo2)
+    {
+        printf("Value[%d]: %f\n", i, a);
+    }
+    foreach (char i, double a : foo2)
+    {
+        printf("Value2[%d]: %f\n", i, a);
+    }
+    foreach (double a : foo2)
+    {
+        printf("Value3: %f\n", a);
+    }
 }
 
 /* #expect: test.ll