main
deps: update nghttp3 to 1.18.0
deps: update ngtcp2 to 1.25.0
deps: add nghttp3/**/.deps to .gitignore
build: add GN build files
deps: add ngtcp2 and nghttp3
deps: update ngtcp2 to 1.14.0
deps: update ngtcp2 to 1.24.0
build: fix GN build for ngtcp2