Allow simple JSON configuration for site sessions

Different terminals need different hotkeys, but I want the kitty
configuration to be shared. Add a blanket json file to allow
creating more advanced configurations per site while keeping the
rest of the config common.

install.conf.yaml

@@ -7,6 +7,8 @@
 - link:
     ~/.bashrc: bashrc
     ~/.vimrc: vimrc
+    ~/.config/kitty/kitty.conf: kitty.conf
+    ~/.scripts: scripts
 
 - shell:
     - [git submodule update --init --recursive, Installing submodules]