Drop fzf installation, favor package manager installed version

My dotfiles rarely change, but the plugins and apps I use have regular
updates. I don't refresh my local dotfiles frequently, so it makes sense
to favor moving these things out of my installer and let the operating
system's package manager handle keeping them up to date.

Also left some notes for later when I get my new MBP.

zsh/.zshrc

@@ -66,9 +66,12 @@ PS1='
 %F{blue}%~$(git_prompt)
 %F{244}%# %F{reset}'
 
-source $HOME/.fzf.zsh
+# TODO: May need to tweak this for macOS/brew installed fzf
+source /usr/share/fzf/key-bindings.zsh
+source /usr/share/fzf/completion.zsh
 
 # Only autoload nvm on a specific machine, default to lazy loading
+# TODO: Maybe drop the lazy loading entirely as I never use nvm outside of work?
 if [[ $(hostname) == "x1carbon.josh" ]]; then
   export NVM_DIR="$([ -z "${XDG_CONFIG_HOME-}" ] \
     && printf %s "${HOME}/.nvm" || printf %s "${XDG_CONFIG_HOME}/nvm")"