chore(vim): add some ivy key mappings for testing

This is not really needed for my config. Its there so we can make sure this
config works for my config when developing ivy.

site-modules/core/files/vim/plugin/ivy.lua

@@ -1,6 +1,8 @@
+local config = require "ivy.config"
+
 -- Set up ivy.nvim
 -- See: https://github.com/AdeAttwood/ivy.nvim
-require('ivy').setup {
+require("ivy").setup {
   backends = {
     "ivy.backends.buffers",
     "ivy.backends.files",
@@ -8,4 +10,8 @@ require('ivy').setup {
     "ivy.backends.lsp-workspace-symbols",
     "ivy.backends.rg",
   },
+  mappings = vim.tbl_extend("force", config:get { "mappings" }, {
+    ["<C-M-n>"] = "next_checkpoint",
+    ["<C-M-p>"] = "previous_checkpoint",
+  }),
 }