chore: update flake.lock + use which-key helix preset

nvim/plugin/plugins.lua

@@ -7,4 +7,3 @@ vim.g.did_load_plugins_plugin = true
 -- even with default configs
 
 require('nvim-surround').setup()
-require('which-key').setup()

nvim/plugin/which-key.lua

@@ -0,0 +1,3 @@
+require('which-key').setup {
+  preset = 'helix'
+}