修改项目结构以便于扩展，引入clang-format格式化

tests/test_simple.c

@@ -0,0 +1,17 @@
+#include "logging.h"
+
+
+int main() {
+    Logging *log = createLogging();
+    Logger *logger = log->getLogger("testLogger",LOG_DEBUG);
+    logger->addHandler(consoleHandler("test"));
+
+    logger->info("This is an info message");
+    logger->error("你好,这是一个错误消息%s", "123");
+    logger->fatal("This is an fatal message");
+    logger->debug("This is a debug message");
+    logger->warning("This is a warning message%s", "123");
+
+    destroyLogging(log);
+    return 0;
+}