SDL: include: Added documentation for SDL_PRESSED and SDL_RELEASED.

From 9fd54b724f14243f56240752b8347b66a34e18e7 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Wed, 26 Jun 2024 14:08:56 -0400
Subject: [PATCH] include: Added documentation for SDL_PRESSED and
 SDL_RELEASED.

Fixes #10069.
---
 include/SDL3/SDL_events.h | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/include/SDL3/SDL_events.h b/include/SDL3/SDL_events.h
index db56f790d8d7a..6e30acc48e258 100644
--- a/include/SDL3/SDL_events.h
+++ b/include/SDL3/SDL_events.h
@@ -46,10 +46,27 @@
 extern "C" {
 #endif
 
-/* General keyboard/mouse state definitions */
+/* General keyboard/mouse/pen state definitions */
+
+/**
+ * A value that signifies a button is no longer pressed.
+ *
+ * \since This macro is available since SDL 3.0.0.
+ *
+ * \sa SDL_PRESSED
+ */
 #define SDL_RELEASED    0
+
+/**
+ * A value that signifies a button has been pressed down.
+ *
+ * \since This macro is available since SDL 3.0.0.
+ *
+ * \sa SDL_RELEASED
+ */
 #define SDL_PRESSED     1
 
+
 /**
  * The types of events that can be delivered.
  *