refactor: optimize file watching and fix cross-platform reliability issues

Refactor memory allocation patterns:
- Replace realloc-in-loop with count-then-allocate pattern across all platforms
- Eliminate arbitrary buffer sizes (e.g., malloc(8 * ...)) in favor of exact counts
- Reduce allocation overhead by pre-counting items before malloc

Fix Windows file watching:
- Replace unreliable FindFirstChangeNotification with directory handle approach
- Add is_file_ready() to prevent events while compiler is still writing files
- Preserve timestamps when file is locked to retry on next poll
- Fix do-while loop in platform_directory_init_scan (was skipping first file)

Fix Linux inotify event handling:
- Consolidate DELETE+CREATE pairs into single RELOAD event
- Prevents duplicate events when compiler uses temp-file-and-rename pattern

Fix BSD/macOS kqueue implementation:
- Remove realloc loops from update_watches() and watch initialization
- Pre-count files before allocating file descriptor arrays

All platforms now correctly handle:
- Compiler overwrites (temp file operations)
- Manual copy/move operations
- Explicit file deletions

Tested on Linux, Windows 10, and FreeBSD.

gmake.mk

@@ -1,13 +1,10 @@
 include config.mk 
 
 ifeq ($(OS),Windows_NT)
-    # Force the shell to cmd.exe to avoid bash/sh interference
     SHELL := cmd.exe
     FULL_LIB := $(LIB_NAME).dll 
     LDFLAGS_PLAT := 
     CFLAGS_PLAT := 
-    # Windows-safe directory creation: check existence, then create
-    # Use 2>NUL to silence "directory already exists" warnings if any
     MKDIR = if not exist $(subst /,\,$(1)) mkdir $(subst /,\,$(1))
     RMDIR = if exist $(subst /,\,$(1)) rd /s /q $(subst /,\,$(1))
 else
@@ -50,4 +47,4 @@ obj/release/%.o: src/%.c
 
 clean: 
 	@$(call RMDIR,$(OBJ_DIR))
-	@$(call RMDIR,$(BIN_DIR))
+	@$(call RMDIR,$(BIN_DIR))