Split up neonvim configuration into lua files rather than lua heredoc

vim/.config/nvim/lua/user/indentblanklines.lua

@@ -0,0 +1,8 @@
+-- Configure the 'indent-blankline' plugin
+-- Look at configuring this for rainbow blocks at some point
+require('ibl').setup{
+  enabled = false,
+  indent = {
+    char = '|'
+  }
+}