Added clang-tidy config and cleaned up the code a little.

source/mijin/io/stream.hpp

@@ -4,7 +4,6 @@
 #if !defined(MIJIN_IO_STREAM_HPP_INCLUDED)
 #define MIJIN_IO_STREAM_HPP_INCLUDED 1
 
-#include <cassert>
 #include <cstdint>
 #include <optional>
 #include <ranges>
@@ -322,8 +321,9 @@ public:
     }
     void close();
     [[nodiscard]] inline bool isOpen() const { return data_.data() != nullptr; }
-    [[nodiscard]] inline std::size_t availableBytes() const {
-        assert(isOpen());
+    [[nodiscard]] inline std::size_t availableBytes() const
+    {
+        MIJIN_ASSERT(isOpen(), "MemoryStream is not open.");
         return data_.size() - pos_;
     }