fix: reformat codebase and fix const-correctness for CI lint

- Reformat all C/H files to match .clang-format (LLVM style)
- Fix 26 cppcheck const-correctness warnings (constParameterPointer,
  constVariablePointer, constVariable)
- Update function declarations in headers to match const parameters

src/shared/array_list.h

@@ -6,16 +6,16 @@
 #define INITIAL_ARRAY_SIZE 100
 
 typedef struct ArrayList {
-  void **items;
+  void** items;
   int size;
   int capacity;
-  void (*item_destroyer)(void *item);
+  void (*item_destroyer)(void* item);
 } ArrayList;
 
-ArrayList *array_list_create(void (*item_destroyer)(void *item));
-void array_list_delete(ArrayList *array_list);
-bool array_list_extend(ArrayList *array_list);
-bool array_list_add(ArrayList *array_list, void *item);
-void **array_list_to_array(ArrayList *array_list);
+ArrayList* array_list_create(void (*item_destroyer)(void* item));
+void array_list_delete(ArrayList* array_list);
+bool array_list_extend(ArrayList* array_list);
+bool array_list_add(ArrayList* array_list, void* item);
+void** array_list_to_array(const ArrayList* array_list);
 
 #endif