refactor: migrate rust-like ops.

- migrate rust-like ops.
- migrate testbench for them but not finished.

testbench/yycc/num/op.cpp

@@ -0,0 +1,13 @@
+#include <gtest/gtest.h>
+#include <yycc.hpp>
+#include <yycc/num/op.hpp>
+
+#define OP ::yycc::num::op
+
+namespace yycctest::num::op {
+
+    TEST(NumOp, DivCeil) {
+        EXPECT_EQ(OP::div_ceil<uint32_t>(7, 4), UINT32_C(2));
+    }
+
+}