Docs rewrite

content/docs/guide/control-flow.mdx

@@ -0,0 +1,87 @@
+---
+title: Control Flow
+description: If/else, while, for, c-style for, loop, match, break, continue, and return.
+icon: ArrowLeftRight
+---
+
+### If/Else
+
+```mist
+if condition {
+    // body
+} else if other_condition {
+    // body
+} else {
+    // body
+}
+```
+
+Conditions must be parenthesized: `if (expr) { }` or `if expr_no_struct { }` (struct literals require parentheses).
+
+Used as an expression:
+
+```mist
+let x = if true { 1 } else { 2 };
+```
+
+### While
+
+```mist
+while condition {
+    // body
+}
+```
+
+### For
+
+```mist
+for pattern in iterator {
+    // body
+}
+
+for i in 0 .. 10 {
+    // body
+}
+```
+
+### C-Style For
+
+```mist
+for (let mut i = 0; i < 10; i++) {
+    // body
+}
+```
+
+### Loop
+
+```mist
+loop {
+    // infinite loop
+}
+```
+
+### Match
+
+```mist
+match value {
+    pattern1 => expr,
+    pattern2 => {
+        // block body
+    }
+    pattern3 | pattern4 => expr,
+}
+```
+
+### Break / Continue
+
+```mist
+break;
+continue;
+```
+
+### Return
+
+```mist
+return;
+return value;
+```