feat: updated fish config

shell/fish_setup.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+# install fisher
+curl https://git.io/fisher --create-dirs -sLo ~/.config/fish/functions/fisher.fish
+
+# install sushi-theme
+fisher add https://github.com/umayr/theme-sushi
+
+# install bass
+fisher add edc/bass
+
+# install fzf bin
+sudo apt install fzf
+
+# install fzf
+fisher add jethrokuan/fzf
+
+# customize theme / prompt