fix: Resolve warnings in multiple components

kernel/src/CppLib/Alloc.cpp

@@ -13,6 +13,11 @@ void* operator new(std::size_t size)
 }
 
 void operator delete(void* block)
+{
+    Memory::g_heap->Free(block);
+}
+
+void operator delete(void* block, long unsigned int)
 {
     Memory::g_heap->Free(block);
 }

kernel/src/CppLib/Stream.cpp

@@ -74,6 +74,8 @@ kcp::cstringstream& kcp::cstringstream::operator<<(uint64_t val) {
 kcp::cstringstream& kcp::cstringstream::operator<<(base nb)
 {
     current_base = nb;
+    
+    return *this;
 }
 
 const char* kcp::cstringstream::cstr() {