phase: 20.49 COMPLETE; 20.50 Flow+String minimal reps; 20.51 selfhost v0/v1 minimal (Option A/B); hv1-inline binop/unop/copy; docs + run_all + CURRENT_TASK -> 21.0

examples/semantics_test_branch.hako

@@ -0,0 +1,17 @@
+// Semantics test - Branch/Phi example
+
+static box Main {
+    main() {
+        local x, y, result
+        x = 10
+        y = 20
+        
+        if x < y {
+            result = 100
+        } else {
+            result = 200
+        }
+        
+        return result  // Should be 100
+    }
+}