Add Waylight namespace

Signed-off-by: Slendi <slendi@socopon.com>

src/ImGui.cpp

@@ -11,6 +11,8 @@
 
 #include <raylib.h>
 
+namespace Waylight {
+
 namespace {
 
 struct CodepointSpan {
@@ -786,3 +788,5 @@ auto ImGui::list_view(usize id, Rectangle bounds, usize elements,
 
 	return submitted;
 }
+
+} // namespace Waylight