build core, basic and go variants and add template

template/nvim/init/template.lua

@@ -0,0 +1,12 @@
+local pack = require 'pack'
+
+---
+--- Add your custom neovim configuration here. This file should be named after
+--- your editor variant. You can use `pack '<user>/<repo>'` to load a plugin
+--- and source it's configuration file. For a plugin
+--- 'my-user/nvim-my-repo.nvim', the configuration file plugconf/my-repo.lua
+--- would be source, if it exists ("nvim-" and "vim-" prefixes and everyting
+--- after the first "." get removed from <repo>).
+---
+
+pack 'my-user/nvim-my-repo.nvim'