feat(vim): setup ivy.nvim in the config

This was an update that now it does not get configured by default you need to
call the `setup` function to make it work.

See: https://github.com/AdeAttwood/ivy.nvim/pull/81

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

@@ -0,0 +1,11 @@
+-- Set up ivy.nvim
+-- See: https://github.com/AdeAttwood/ivy.nvim
+require('ivy').setup {
+  backends = {
+    "ivy.backends.buffers",
+    "ivy.backends.files",
+    "ivy.backends.lines",
+    "ivy.backends.lsp-workspace-symbols",
+    "ivy.backends.rg",
+  },
+}