cli improvements

example/makefile

@@ -1,17 +1,18 @@
+CC = clang
 NUBC = ../src/compiler/NubLang.CLI/bin/Debug/net9.0/nubc
 
-out: $(NUBC) main.nub
-	$(NUBC) main.nub
+out: build/out.a
+	$(CC) -o out build/out.a
+
+build/out.a: $(NUBC) src/main.nub
+	$(NUBC) src/main.nub
 
 $(NUBC):
 	dotnet build ../src/compiler/NubLang.CLI/NubLang.CLI.csproj
 
 run: out
-	out
+	./out
 
 clean:
+	@rm -r build 2>/dev/null || true
 	@rm out 2>/dev/null || true
-	@rm out.a 2>/dev/null || true
-	@find . -name "*.o" -type f -delete
-	@find . -name "*.s" -type f -delete
-	@find . -name "*.ssa" -type f -delete