Docs rewrite

content/docs/guide/structs-enums.mdx

@@ -0,0 +1,47 @@
+---
+title: Structs & Enums
+description: Defining structs and enums with named, tuple, and struct variants.
+icon: Box
+---
+
+### Structs
+
+```mist
+pub struct Point {
+    i32 x,
+    i32 y,
+}
+
+pub struct Generic<T> {
+    T value,
+}
+```
+
+Fields can be public or private:
+
+```mist
+struct User {
+    pub str& name,
+    i32 age,  // private
+}
+```
+
+### Enums
+
+```mist
+pub enum Option<T> {
+    Some(T),
+    None,
+}
+
+pub enum Message {
+    Quit,
+    Move(i32, i32),
+    Write { str& content, i32 length },
+}
+```
+
+Enum variants can be:
+- **Named** — `Variant`
+- **Tuple** — `Variant(T1, T2)`
+- **Struct** — `Variant { T1 field1, T2 field2 }`