feat: Working on filling in the gaps of LSPs, this time with html

language support.

nvim/after/lsp/r_language_server.lua

@@ -1 +1,8 @@
-return {}
+return {
+    cmd = { 'R', '--slave', '-e', 'languageserver::run()' },
+    filetypes = { 'r', 'rmd' },
+    log_level = 2,
+    root_dir = function(fname)
+        return util.find_git_ancestor(fname) or vim.loop.os_homedir()
+    end,
+}