feat(run): allow run files in notes directories

Move `run` from a simple alias to a function which checks a for a
`.notes/run` file first or defaults back to the previous functionality
and uses a file in the current directory.

roles/zsh/files/config/configs/aliases.zsh

@@ -1,6 +1,5 @@
 alias hosts='sudo vim /etc/hosts'
 alias rebase='git fetch --all --prune --prune-tags && git rebase'
-alias run='./run'
 alias sshconfig='vim ~/.ssh/config'
 alias vim='nvim'