feat: ports - netsurf with the monkey frontend

Co-Authored-By: Claude Opus 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_018Ae69wJS7sueQMUwNxV3nX

.gitmodules

@@ -40,3 +40,6 @@
 [submodule "dev-libs/libutf8proc/upstream"]
 	path = dev-libs/libutf8proc/upstream
 	url = git://git.netsurf-browser.org/libutf8proc.git
+[submodule "www-client/netsurf/upstream"]
+	path = www-client/netsurf/upstream
+	url = https://github.com/netsurf-browser/netsurf.git