feat: error handling, better prelude, double linked lists usage etc

include/prelude/string.hpp

@@ -67,7 +67,6 @@ public:
     const T* end()   const { return data + size; }
 };
 
-
 class StringView final : public View<char>
 {
 public:
@@ -102,6 +101,32 @@ public:
         }
     }
 
+    static StringView FromFormat(const char* fmt, ...)
+    {
+        va_list args;
+        va_start(args, fmt);
+
+        va_list args2;
+        va_copy(args2, args);
+
+        int len = std::vsnprintf(nullptr, 0, fmt, args2);
+        va_end(args2);
+
+        if (len < 0) {
+            va_end(args);
+            return StringView();
+        }
+
+        char* str = new char[len + 1];
+        std::vsnprintf(str, len + 1, fmt, args);
+
+        va_end(args);
+
+        return StringView(str);
+    }
+
+    size_t len() const { return strlen(data); }
+
     const char* c_str() const { return data; }
 };