nvim: Add D language server to auto config

Automatically install D lsp with mason.

nvim/.config/nvim/after/ftplugin/d.lua

@@ -0,0 +1,3 @@
+-- help out mini.comment since the treesitter implementation does not have
+-- comment functionality so far afaik
+vim.bo.commentstring = "// %s"

nvim/.config/nvim/lua/plugins/config/lsp.lua

@@ -32,6 +32,7 @@ local servers = {
 	marksman = {},
 	pyright = {},
 	ruff_lsp = {},
+	serve_d = {},
 	tailwindcss = {},
 	taplo = {},
 	texlab = {},