* Add coc extension list to plugin config to ease first-time setup

* Add coc lua extension to allow us to install plugins during NukeVim
 install
* Update docs to reflect that coc extension installation makes the
 install process look broken.
* Migrate one of the holdover autocmds from vimscript to lua extension
 so it doesn't cause errors when coc is disabled

coc-settings.json

@@ -0,0 +1,4 @@
+{
+	"html.autoClosingTags": false,
+	"html.autoCreateQuotes": false
+}

doc/nukevim.txt

@@ -142,7 +142,9 @@ Check out, unzip, copy or otherwise place the repo contents in your
 Run `nvim +NukeVimInstall +qall` to install all the relevant plugins, perform
 any initial NukeVim or other plugin setup tasks, and exit.
 
-This may take a few minutes.
+This may take a few minutes and may appear to be frozen. I hope to fix this
+eventually, but the coc extension is a little finnicky about how you can
+install things and this is the best I could get for the time being.
 
 
 --------------------------------------------------------------------------------

lua/config/plugins/development.lua

@@ -60,6 +60,18 @@ return {
 			requires = { binary = { 'npm' } },
 			branch = 'release'
 		},
+		config = {
+			extensions = {
+				'coc-css',
+				'coc-html',
+				'coc-json',
+				'coc-markdownlint',
+				'coc-marketplace',
+				'coc-phpls',
+				'coc-sql',
+				'coc-yaml'
+			}
+		},
 		keys = {
 			{ mode = 'n', key = { '<leader>', 'c', 'r' }, map = ":call CocAction('jumpReferences')<CR>", label = "references" },
 		}

lua/plugin/neoclide/coc-nvim.lua

@@ -0,0 +1,18 @@
+local M = require('module'):new()
+
+function M:boot()
+	-- if you leave the cursor on a variable/etc for a moment, this will cause
+	-- all other occurrences to be subtly highlighted.
+	vim.api.nvim_create_autocmd('CursorHold', {
+		pattern = { '*' },
+		command = "silent call CocActionAsync('highlight')"
+	})
+end
+
+function M:install()
+	if (self.config.extensions == nil) then return end
+	exts = table.concat(self.config.extensions, ' ')
+	vim.cmd(':CocInstall -sync '..exts)
+end
+
+return M

startup.vim

@@ -99,9 +99,6 @@ function! s:show_documentation()
 endfunction
 nnoremap <silent> K :call <SID>show_documentation()<CR>
 
-" Highlight the symbol and its references when holding the cursor.
-autocmd CursorHold * silent call CocActionAsync('highlight')
-
 " Merge the signal column (your shit broke, yo') into the number column,
 " or if not supported at least show it all the time so the whole text
 " isn't constantly shifting as errors appear/disappear.