includes/type: Added magic number assertion type

includes/type/magic.pat

@@ -0,0 +1,19 @@
+#include <std/string.pat>
+#include <std/sys.pat>
+
+namespace type {
+
+    struct Magic<auto ExpectedValue> {
+        char value[std::string::length(ExpectedValue)];
+        std::assert(value == ExpectedValue, std::format("Invalid magic value! Expected \"{}\", got \"{}\".", ExpectedValue, value));
+    } [[sealed, format("type::impl::format_magic")]];
+    
+    namespace impl {
+    
+        fn format_magic(ref auto magic) {
+            return magic.value;
+        };
+        
+    }
+
+}