Common: include <cstdint> in CPrimalGrid.hpp and remove duplicate <limits> (#2629)

This header declares PeriodIndexNeighbors as int8_t but relied on indirect includes for the type.
Add an explicit #include <cstdint> to ensure portability across compilers and platforms
(MSVC/Clang/GCC), and deduplicate a repeated <limits> include. No functional/runtime changes;
this is a safe, hygiene-only fix that reduces the risk of build failures in strict toolchains
and keeps the header self-contained.

- Touches: Common/include/geometry/primal_grid/CPrimalGrid.hpp
- Behavior change: none
- Risk: low; header-only; does not affect algorithms, IO, or numerics

Signed-off-by: Shubham shukla
Co-authored-by: Pedro Gomes <[email protected]>

Author: shbhmexe

Common/include/geometry/primal_grid/CPrimalGrid.hpp

@@ -28,11 +28,11 @@
 
 #pragma once
 
+#include <cstdint>
 #include <iostream>
 #include <vector>
 #include <limits>
 #include <cstdlib>
-#include <limits>
 #include <memory>
 
 #include "../../option_structure.hpp"