Add .zshenv

`.zshenv` is read for all shells, interactive or not, making it the best
place to set variables that always apply.  Unfortunately, it cannot be
kept in `ZDOTDIR`, since that variable has to be set in that same
script.  To work around this, the "real" `.zshenv` can source the one in
`ZDOTDIR`.

.zprofile

@@ -1,6 +0,0 @@
-typeset -U path
-path[1,0]=~/.local/bin
-
-if [[ -r ${ZDOTDIR:-${HOME}}/.zprofile.local ]]; then
-	. ${ZDOTDIR:-${HOME}}/.zprofile.local
-fi

.zshenv

@@ -0,0 +1,6 @@
+export EDITOR=vim
+
+typeset -U path
+path[1,0]=~/.npm/bin
+path[1,0]=~/.cargo/bin
+path[1,0]=~/.local/bin

README

@@ -1,4 +1,5 @@
-Add this line to ~/.zshenv in order to use these ZSH configuration files
+Add these lines to ~/.zshenv in order to use these ZSH configuration files
 without copying/linking them to the "standard" paths:
 
     export ZDOTDIR=${HOME}/.zsh
+    source ${ZDOTDIR}/.zshenv