fix(test): ensure Windows compatibility in test suite

- Add OS detection for Windows vs Unix platforms
- Handle .exe extension on Windows for test program
- Fix directory creation with Windows-native commands (mkdir/copy vs mkdir -p/cp)
- Update clean target to use appropriate commands per platform
- Set PATH environment for DLL loading on Windows
- Remove broken uname detection that fails on Windows

test/gmake.mk

@@ -2,42 +2,46 @@ CC := cc
 CFLAGS = -Wall -Wpedantic -I../include -std=c89
 LDFLAGS = -L../bin/debug -lstk
 
-UNAME_S := $(shell uname -s)
-
 ifeq ($(OS),Windows_NT)
     MODULE_EXT = .dll
+    EXE_EXT = .exe
 else
-    LDFLAGS += -Wl,-rpath,../bin/debug
     MODULE_EXT = .so
+    EXE_EXT =
+    LDFLAGS += -Wl,-rpath,../bin/debug
 endif
 
 .PHONY: all test clean
 
 all: test
 
-test_program: test.c
-	$(CC) $(CFLAGS) -o $@ $< $(LDFLAGS)
+test_program$(EXE_EXT): test.c
+	$(CC) $(CFLAGS) -o $@ test.c $(LDFLAGS)
 
 test_mod$(MODULE_EXT): test_mod.c
-	$(CC) $(CFLAGS) -fPIC -shared -o $@ $<
+	$(CC) $(CFLAGS) -fPIC -shared -o $@ test_mod.c
 
 setup:
+ifeq ($(OS),Windows_NT)
+	@if not exist mods mkdir mods
+	@if exist test_mod.dll copy /Y test_mod.dll mods\ >nul 2>&1
+else
 	@mkdir -p mods
-	@cp -f test_mod$(MODULE_EXT) mods/ 2>/dev/null || true
-	@echo " Test environment ready: mods/ directory with test_mod$(MODULE_EXT)"
+	@cp -f test_mod.so mods/ 2>/dev/null || true
+endif
 
-run: test_program test_mod$(MODULE_EXT) setup
-	@echo "Running integration test (CTRL+C to exit)..."
+test: test_program$(EXE_EXT) test_mod$(MODULE_EXT) setup
+ifeq ($(OS),Windows_NT)
+	@set PATH=../bin/debug;%PATH% && cmd /C "test_program.exe"
+else
 	@./test_program
-
-test: test_program test_mod$(MODULE_EXT) setup
-	@echo "=== stk Integration Test ==="
-	@echo "1. Starting test program"
-	@echo "2. Will load test_mod$(MODULE_EXT) from mods/"
-	@echo "3. Press CTRL+C to exit"
-	@echo "============================="
-	@./test_program || echo "Test completed."
+endif
 
 clean:
-	rm -f test_program test_mod$(MODULE_EXT)
-	rm -rf mods/
+ifeq ($(OS),Windows_NT)
+	@del /Q test_program.exe test_mod.dll 2>nul || true
+	@rmdir /S /Q mods 2>nul || true
+else
+	@rm -f test_program test_mod.so
+	@rm -rf mods
+endif