feat(nix): migrate Neovim to Nix (as a symlink)

nix/home/neovim/nvim/lua/plugins/notify.lua

@@ -0,0 +1,10 @@
+-- A fancy, configurable notification manager
+-- https://github.com/rcarriga/nvim-notify
+return {
+  "rcarriga/nvim-notify",
+  opts = {
+    render = "minimal",
+    stages = "static",
+    timeout = 2000,
+  },
+}