Enable vim bindings in zsh

zsh/custom.zsh

@@ -1,3 +1,22 @@
+# vim bindings
+bindkey -v
+export KEYTIMEOUT=1
+
+# Use vim cli mode
+bindkey '^P' up-history
+bindkey '^N' down-history
+
+# backspace and ^h working even after
+# returning from command mode
+bindkey '^?' backward-delete-char
+bindkey '^h' backward-delete-char
+
+# ctrl-w removed word backwards
+bindkey '^w' backward-kill-word
+
+# ctrl-r starts searching history backward
+bindkey '^r' history-incremental-search-backward
+
 if [ "light" = "$THEME_SWITCHER" ]; then
     ZSH_THEME="sunrise"
 else