zsh: Move 'change directory into repo root' logic

Add an alias that switches directories into the repository root, instead
of having the normal `cd` command behave like that.

Sadly this is not possible (AFAIK) with a git alias as that will always
spawn a subshell.

.config/zsh/zshrc.d/30-alias.zsh

@@ -60,6 +60,7 @@ fi
 	alias ga='git add'
 	alias gap='git add -p'
 	alias gc='git commit'
+	alias gcd='cd "$(git rev-parse --show-toplevel)"'
 	alias gch='git checkout'
 	alias gd='git diff'
 	alias gds='git diff --staged'

.config/zsh/zshrc.d/40-functions.zsh

@@ -359,28 +359,17 @@ mvln() {
 	return $reg
 }
 
-## cd wrapper that when called without arguments, moves into the root of the
-## current repo instead of HOME. (Except when already there)
+## cd-wrapper that recognizes a trailing `ls` behind the path (When not properly
+## pressing <CR>)
 cd() {
-	if [[ $# -gt 0 ]]; then
-		# Call `ls` on paths that end on '/ls' and don't exist with the suffix.
-		# (When not properly pressing <CR>)
-		if [[ ! -e ${@[-1]} && -e ${@[-1]%%/ls} ]]; then
-			builtin cd "${@[1,-2]}" "${@[-1]%%ls}"
-			pwd
-			ls
-		else
-			builtin cd "$@"
-		fi
-		return
-	fi
-
-	local toplevel
-	toplevel="$(git rev-parse --show-toplevel 2>/dev/null)"
-	if (( $? )) || [[ $PWD = $toplevel ]]; then
-		builtin cd
+	# Call `ls` on paths that end on '/ls' and don't exist with the suffix.
+	# (When not properly pressing <CR>)
+	if [[ ! -e ${@[-1]} && -e ${@[-1]%%/ls} ]]; then
+		builtin cd "${@[1,-2]}" "${@[-1]%%ls}"
+		pwd
+		ls
 	else
-		builtin cd "$toplevel"
+		builtin cd "$@"
 	fi
 }