vim: Add surround and delimitMate plugins

These plugins add functionality to automatically close and surround text
with parantheses, brackets, quotes, etc.
Overwrite the vim-surround default bindings since they conflict with my
substitute bindings.

.gitmodules

@@ -22,12 +22,18 @@
 [submodule ".config/vim/plugged/coc.nvim"]
 	path = .config/vim/pack/plugins/opt/coc.nvim
 	url = https://github.com/neoclide/coc.nvim.git
+[submodule ".config/vim/pack/plugins/opt/delimitMate"]
+	path = .config/vim/pack/plugins/opt/delimitMate
+	url = https://github.com/Raimondi/delimitMate.git
 [submodule ".config/vim/plugged/onedark.vim"]
 	path = .config/vim/pack/plugins/opt/onedark.vim
 	url = https://github.com/joshdick/onedark.vim
 [submodule ".config/vim/plugged/vim-gitgutter"]
 	path = .config/vim/pack/plugins/opt/vim-gitgutter
 	url = https://github.com/airblade/vim-gitgutter
+[submodule ".config/vim/pack/plugins/opt/vim-surround"]
+	path = .config/vim/pack/plugins/opt/vim-surround
+	url = https://github.com/tpope/vim-surround
 [submodule ".config/zsh/plugins/fzf"]
 	path = .config/zsh/plugins/fzf
 	url = https://github.com/junegunn/fzf