Ports: Add Sonic Robo Blast 2

This commit adds Sonic Robo Blast 2, a Sonic fangame running with SDL2
to the list of SerenityOS game ports.
The game is working fine for the most part but there's some performance
issues and the mouse never resets to the center so it gets stuck in the
window's corners. It seems like the multiplayer / networking is also
not quite working but I think that this is very cool already.

Ports/SRB2/patches/0002-fix-libgme-include.patch

@@ -0,0 +1,23 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Refrag <R3FR4GYT@gmail.com>
+Date: Sun, 4 Feb 2024 17:45:15 +0100
+Subject: [PATCH] Fix libgme include
+
+One of the build targets is looking for the gme.h header.
+It seems like it cannot automatically find it so we help it a little.
+---
+ CMakeLists.txt | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 80a3bdcd6..a01d32e1f 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -168,6 +168,7 @@ set(SRB2_SDL2_EXE_NAME "" CACHE STRING "Override executable binary output name")
+ set(SRB2_SDL2_EXE_SUFFIX "" CACHE STRING "Optional executable suffix, separated by an underscore")
+ 
+ include_directories(${CMAKE_CURRENT_BINARY_DIR}/src)
++include_directories(${CMAKE_BINARY_DIR}/_deps/libgme-src)
+ 
+ add_subdirectory(src)
+ add_subdirectory(assets)