docs: add Origins section

Author: Interested-Deving-1896

README.md

@@ -255,3 +255,10 @@ reference Zen-introduced symbols when deduplicating conflicts.
 ## License
 
 GPL-2.0 — same as the Linux kernel.
+
+## Origins
+
+liqxanmod merges two upstream kernel patch sets:
+- [xanmod/linux](https://gitlab.com/xanmod/linux) — XanMod performance patch set
+- [zen-kernel/zen-kernel](https://github.com/zen-kernel/zen-kernel) — Zen/Liquorix low-latency patch set
+- [damentz/liquorix-package](https://github.com/damentz/liquorix-package) — Liquorix build configuration reference