Docs rewrite

content/docs/guide/generics.mdx

@@ -0,0 +1,39 @@
+---
+title: Generics
+description: Generic functions, structs, enums, trait bounds, and lifetimes.
+icon: Braces
+---
+
+```mist
+// Generic function
+T id<T>(T x)
+{
+    x
+}
+
+// Generic struct
+struct Pair<A, B> {
+    A first,
+    B second,
+}
+
+// Generic enum
+enum Result<T, E> {
+    Ok(T),
+    Err(E),
+}
+
+// Generic with trait bounds
+T max<T : Ord>(T a, T b)
+{
+    if a > b { a } else { b }
+}
+
+// Lifetime generics
+void process<'a>(&'a str& data)
+{
+    // ...
+}
+```
+
+Generic syntax uses `<` `>` delimiters. Lifetimes are prefixed with `'`.