Set alias to batcat if needed

rc/env.sh

@@ -4,6 +4,10 @@ export EDITOR=vim
 # https://docs.microsoft.com/en-us/dotnet/core/tools/telemetry
 export DOTNET_CLI_TELEMETRY_OPTOUT=1
 
+if ! can_run bat && can_run batcat; then
+  alias bat=batcat
+fi
+
 if can_run bat; then
   export MANPAGER="sh -c 'col -bx | bat -l man -p'"
 fi