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/0003-disable-consolevar-value-checker-sad-path.patch

@@ -0,0 +1,34 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Refrag <R3FR4GYT@gmail.com>
+Date: Sun, 4 Feb 2024 17:45:16 +0100
+Subject: [PATCH] Disable Console Variables value checker sad path
+
+For some reason, the value checker for console variables seems to not behave properly even with the default console variables value.
+Disabling the error path resolves this issue and the game still works fine without it.
+---
+ src/command.c | 5 -----
+ 1 file changed, 5 deletions(-)
+
+diff --git a/src/command.c b/src/command.c
+index e1a43522d..4336d19ac 100644
+--- a/src/command.c
++++ b/src/command.c
+@@ -1522,8 +1522,6 @@ static void Setvalue(consvar_t *var, const char *valstr, boolean stealth)
+ 				override = true;
+ 				overrideval = v;
+ 			}
+-			if (v == INT32_MIN)
+-				goto badinput;
+ #undef MINVAL
+ #undef MAXVAL
+ 		}
+@@ -1558,9 +1556,6 @@ static void Setvalue(consvar_t *var, const char *valstr, boolean stealth)
+ 							goto found;
+ 				}
+ 			}
+-
+-			// ...or not.
+-			goto badinput;
+ found:
+ 			if (client && execversion_enabled)
+ 			{