add slop-free-fork for xylophone (#1805)

### Description of Changes

- add slop-free-fork for xylophone

- style: remove multi-reference links (phoenix, xylophone)

Reviewed-on: https://codeberg.org/ethical-foss/open-slopware/pulls/1805
Reviewed-by: Ethical FOSS admin <ethical-foss-admin@noreply.codeberg.org>

README.md

@@ -1439,8 +1439,8 @@ A desktop environment usually depends on a specific window manager to work.
 > ### Display Servers Alternatives
 > * [Wayland](https://wayland.freedesktop.org/)
 > #### X.org
-> * [Phoenix]
-> * [Xylophone] [![Anti-AI Policy](./badges/anti-ai-policy.svg)](#anti-ai-policy) ([1](https://codeberg.org/Xylophone/xserver/src/branch/main/No-LLM.md))
+> * [Phoenix](https://git.dec05eba.com/phoenix/)
+> * [Xylophone](https://codeberg.org/Xylophone/xserver) [![Anti-AI Policy](./badges/anti-ai-policy.svg)](#anti-ai-policy) ([1](https://codeberg.org/Xylophone/xserver/src/branch/main/No-LLM.md)) [![Slop-Free Fork](./badges/slop-free-fork.svg)](#slop-free-fork)
 
 ## Documents
 
@@ -3419,7 +3419,6 @@ This repository is licensed under the Creative Commons Attribution Share Alike 4
 [Pandemonium Engine]: https://pandemoniumengine.org/
 [pandemonium-policy]: https://github.com/Relintai/pandemonium_engine/blob/master/README.md#contributions-use-of-ai-content-generators
 [PCem]: https://github.com/sarah-walker-pcem/pcem
-[Phoenix]: https://git.dec05eba.com/phoenix/
 [Schilytools]: https://codeberg.org/schilytools/schilytools
 [Scratch 1.4]: https://scratch.mit.edu/scratch_1.4
 [Scratch 2]: https://scratch.mit.edu/download/scratch2
@@ -3433,4 +3432,3 @@ This repository is licensed under the Creative Commons Attribution Share Alike 4
 [Vulkano]: https://github.com/vulkano-rs/vulkano
 [Waterfox]: https://github.com/BrowserWorks/waterfox
 [Yarn Classic]: https://classic.yarnpkg.com/
-[Xylophone]: https://codeberg.org/Xylophone/xserver