Add single header and single source entries for all components as well as the full library (#2)

Reviewed-on: #2
Co-authored-by: Abdelrahman <said.abdelrahman89@gmail.com>
Co-committed-by: Abdelrahman <said.abdelrahman89@gmail.com>

src/core/wapp_core.h

@@ -0,0 +1,10 @@
+#ifndef WAPP_CORE_H
+#define WAPP_CORE_H
+
+#include "mem_arena_allocator.h"
+#include "mem_arena.h"
+#include "mem_allocator.h"
+#include "str8.h"
+#include "wapp_common.h"
+
+#endif // !WAPP_CORE_H