Add link to weechat-hints kitten

Author: GermainZ

docs/integrations.rst

@@ -112,3 +112,7 @@ Miscellaneous
 
 `kitti3 <https://github.com/LandingEllipse/kitti3>`_
     allow using kitty as a drop-down terminal under the i3 window manager
+
+`weechat-hints <https://github.com/GermainZ/kitty-weechat-hints>`_
+    URL hints kitten for WeeChat that works without having to use WeeChat's
+    raw-mode.

docs/kittens/custom.rst

@@ -196,3 +196,7 @@ Kittens created by kitty users
 `insert password <https://github.com/kovidgoyal/kitty/issues/1222>`_
     Insert a password from a CLI password manager, taking care to only do it at
     a password prompt.
+
+`weechat-hints <https://github.com/GermainZ/kitty-weechat-hints>`_
+    URL hints kitten for WeeChat that works without having to use WeeChat's
+    raw-mode.