add DOSBox-X (#329)

* Rename favicon.ico to dosboxx.ico

* Update dosboxx.txt

Author: Coolgamerguy-tech

dosboxx.txt

@@ -0,0 +1,13 @@
+[Section]
+Name = DOSBox-X
+Version = 2025.05.03
+License = GPL
+Description = DOSBox-X is a DOS emulator, it has more technical option compare to DOSBox.
+Category = 16
+URLSite = https://dosbox-x.com/
+URLDownload = https://github.com/joncampbell123/dosbox-x/releases/download/dosbox-x-v2025.05.03/dosbox-x-winXP-2025.05.03-setup.exe
+SHA1 = 6c12a4f3bc91cb26bc500026adfebfec4942a129
+SizeBytes = 52287242
+
+[Section.040c]
+Description = DOSBox-X est un émulateur pour DOS, il y a plus d'options avancées comparé à DOSBox.