move xdg directories to the default location.

a lot of applications seem to hardcode this location, so it's better to
have something default, or default-adjasoned.

.config/nvim/lua/plugin/luasnip.lua

@@ -0,0 +1,5 @@
+return { {
+	'L3MON4D3/LuaSnip',
+	build = 'make install_jsregexp',
+	version = "v2.*",
+} }