SDL: Added documentation for SDL_DisplayID and SDL_WindowID for consistency.

From 156aab2147afb798283d9bc030a6280b3cba9e15 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Fri, 16 Aug 2024 15:46:22 -0700
Subject: [PATCH] Added documentation for SDL_DisplayID and SDL_WindowID for
 consistency.

---
 include/SDL3/SDL_video.h | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/include/SDL3/SDL_video.h b/include/SDL3/SDL_video.h
index 6fe65080a964a..d9cf08fca6a76 100644
--- a/include/SDL3/SDL_video.h
+++ b/include/SDL3/SDL_video.h
@@ -41,8 +41,25 @@
 extern "C" {
 #endif
 
-
+/**
+ * This is a unique ID for a display for the time it is connected to the
+ * system, and is never reused for the lifetime of the application.
+ *
+ * If the display is disconnected and reconnected, it will get a new ID.
+ *
+ * The value 0 is an invalid ID.
+ *
+ * \since This datatype is available since SDL 3.0.0.
+ */
 typedef Uint32 SDL_DisplayID;
+
+/**
+ * This is a unique ID for a window.
+ *
+ * The value 0 is an invalid ID.
+ *
+ * \since This datatype is available since SDL 3.0.0.
+ */
 typedef Uint32 SDL_WindowID;
 
 /* Global video properties... */