zsh: Reorder zshrc components and move stuff

Put the external plugins to the end as well as z-sy-h to the end of the
plugins.
Put the last remaining lines in the zshrc in their own modules.

.config/zsh/zshrc.d/50-autoload.zsh

@@ -0,0 +1,12 @@
+autoload -U select-word-style && select-word-style bash
+
+autoload edit-command-line; zle -N edit-command-line
+
+(( ! $+aliases[run-help] )) || unalias run-help
+autoload -Uz run-help run-help-git zmv
+
+# Load autoloadable functions
+if [[ -d "$ZDOTDIR/autoload" ]]; then
+	fpath=("$ZDOTDIR/autoload" $fpath)
+	autoload -Uz -- "" "${fpath[1]}"/[^_.]*(.xN:t)
+fi

.config/zsh/zshrc.d/90-external-plugins/70-direnv

@@ -0,0 +1 @@
+! command -v direnv &>/dev/null || eval "$(direnv hook zsh)"