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/data.c

@@ -2,8 +2,8 @@
 #include "log.h"
 #include "stdlib.h"
 
-Data *data_create_empty(size_t data_size) {
-  void *data = malloc(data_size);
+Data* data_create_empty(size_t data_size) {
+  void* data = malloc(data_size);
   if (data == NULL) {
     log_message(LOG_LEVEL_ERROR, "Could not allocate memory for empty data");
     return NULL;
@@ -11,8 +11,8 @@ Data *data_create_empty(size_t data_size) {
   return data_create(data, data_size);
 }
 
-Data *data_create_reserve(size_t size) {
-  Data *d = malloc(sizeof(Data));
+Data* data_create_reserve(size_t size) {
+  Data* d = malloc(sizeof(Data));
   if (d == NULL) {
     log_message(LOG_LEVEL_ERROR, "Could not allocate memory for data");
     return NULL;
@@ -22,8 +22,8 @@ Data *data_create_reserve(size_t size) {
   return d;
 }
 
-Data *data_create(void *data, size_t data_size) {
-  Data *new_data = malloc(sizeof(Data));
+Data* data_create(void* data, size_t data_size) {
+  Data* new_data = malloc(sizeof(Data));
   if (new_data == NULL) {
     log_message(LOG_LEVEL_ERROR, "Could not allocate memory for data");
     free(data);
@@ -34,8 +34,9 @@ Data *data_create(void *data, size_t data_size) {
   return new_data;
 }
 
-void data_destroy(Data *data) {
-  if (data == NULL) return;
+void data_destroy(Data* data) {
+  if (data == NULL)
+    return;
   free(data->data);
   free(data);
 }