Nvim/vim plug (#1)

* Update: swap from Vundle (dead, unmaintained) to vim-plug (more features, maintained)

* Chore: swap from scrooloose/nerdtree to preservim/nerdtree, add on demand loading

* Update: plugin optimizations

* Remove: unused plugin

* Remove: unused plugin

* Update: plugin optimizations - lazy load for markdown files

* Remove: outdated snippet, use plugin instead

install.zsh

@@ -73,8 +73,9 @@ mkdir -p ~/.config
 mkdir -p ~/.config/nvim/
 # ---}}}
 
-# -- Install Vundle -- {{{
-git clone https://github.com/VundleVim/Vundle.vim.git ~/.config/nvim/bundle/Vundle.vim
+# -- Install vim-plug -- {{{
+sh -c 'curl -fLo "${XDG_DATA_HOME:-$HOME/.local/share}"/nvim/site/autoload/plug.vim --create-dirs \
+       https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim'
 # -- }}}
 
 # -- Install TPM -- {{{

installation/generic/neovim.zsh

@@ -1,7 +1,7 @@
 #! /bin/zsh
 
 # Install neovim plugins
-nvim +PluginInstall +qall
+nvim +'PlugInstall --sync' +qall &> /dev/null < /dev/tty
 
 # install neovim python 3 module
 pip3 install neovim