Track ttfx releases from GitHub and build its assembly engine

ttfx releases are now published on GitHub only, so sync-upstream picks up new
versions through a github watch instead of ttfx's release script editing this
recipe. The recipe also points at the repository's current home, and x86_64
builds pull in NASM, which the new assembly engine needs (without it the
build silently falls back to the Rust engine).

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MxJcVYpBxFDam6czK4bGjp

pkgbuilds/ttfx/.omarchy/package.json

@@ -1,3 +1,9 @@
 {
-  "source": "local"
+  "source": "local",
+  "upstream": {
+    "watch": {
+      "github": "omacom/ttfx",
+      "pattern": "v(?P<version>[0-9]+(?:\\.[0-9]+)*)"
+    }
+  }
 }