refactor(WIP): replace event stubs with module identification logic

Replace the placeholder TODO logs in the polling loop with logic to
resolve filesystem events into specific module indices.

- Centralizing State: Refactored is_module_loaded to is_mod_loaded to
  check against the global stk_module_ids array, removing the need to
  pass local buffers and preparing for unified lifetime management.
- Standardizing Identity: Updated extract_module_id to use a
  consistent output buffer.
- Categorized Event Processing: Implemented a two-pass approach in
  stk_poll to count event types (LOAD, UNLOAD, RELOAD) and allocate
  tracking arrays, replacing the previous stubbed switch statement.
- Mapping Events to Indices: The poll loop now resolves filenames
  back to their specific loaded indices via is_mod_loaded to
  identify exactly which mod_id and index require action.
- Improved Flow Control: Introduced a finish_stk_poll label to
  ensure consistent cleanup and return values when no events are
  detected or processing is complete.

src/platform.c

@@ -24,9 +24,9 @@
 #include <unistd.h>
 #endif
 
-int is_module_loaded(const char *filename,
-		     char (*loaded_ids)[STK_MOD_ID_BUFFER], size_t count);
+int is_mod_loaded(const char *module_name);
 uint8_t is_valid_module_file(const char *filename);
+void extract_module_id(const char *path, char *out_id);
 
 #ifdef _WIN32
 static uint8_t is_file_ready(const char *dir_path, const char *filename)
@@ -629,8 +629,9 @@ stk_module_event_t *platform_directory_watch_check(
 
 			event_type = STK_MOD_UNLOAD;
 			if (e->mask & (IN_CLOSE_WRITE | IN_MOVED_TO)) {
-				if (is_module_loaded(e->name, loaded_ids,
-						     loaded_count) >= 0)
+				char event_module_name[STK_MOD_ID_BUFFER];
+				extract_module_id(e->name, event_module_name);
+				if (is_mod_loaded(event_module_name) >= 0)
 					event_type = STK_MOD_RELOAD;
 				else
 					event_type = STK_MOD_LOAD;