docs: Mention the cookbook in the README
docs: Mention the cookbook in the README

In the "Resources" section, along with the API references.

djdeath/clutter-android,djdeath/clutter-android,GNOME/clutter,spatulasnout/clutter,heysion/clutter-clone,GNOME/clutter,heysion/clutter-clone,djdeath/clutter-android,spatulasnout/clutter,djdeath/clutter-multithreaded,ebassi/clutter,Distrotech/clutter,spatulasnout/clutter,djdeath/clutter,Distrotech/clutter,dlespiau/clutter,Distrotech/clutter,djdeath/clutter,collects/clutter,kerrickstaley/clutter-vala,Distrotech/clutter,djdeath/clutter,kerrickstaley/clutter-vala,Distrotech/clutter,collects/clutter,djdeath/clutter-multithreaded,djdeath/clutter-multithreaded,ebassi/clutter,heysion/clutter-clone,spatulasnout/clutter,ebassi/clutter,collects/clutter,ebassi/clutter,collects/clutter,djdeath/clutter-android,djdeath/clutter-android,djdeath/clutter,GNOME/clutter,spatulasnout/clutter,jigpu/clutter,jigpu/clutter,dlespiau/clutter,jigpu/clutter,Distrotech/clutter,heysion/clutter-clone,jigpu/clutter,jigpu/clutter,GNOME/clutter,collects/clutter,djdeath/clutter,jigpu/clutter,heysion/clutter-clone,kerrickstaley/clutter-vala,djdeath/clutter-multithreaded,ebassi/clutter,GNOME/clutter,kerrickstaley/clutter-vala,djdeath/clutter,dlespiau/clutter