refactor plugins into directory

lua/plugins/which-key.lua

@@ -0,0 +1,19 @@
+return {
+  { -- Shows keybindings as you go
+    'folke/which-key.nvim',
+    event = 'VimEnter',
+    config = function()
+      require('which-key').setup()
+      -- Document existing key chains
+      require('which-key').add {
+        { '<leader>c', group = '[C]ode' },
+        { '<leader>d', group = '[D]ocument' },
+        { '<leader>r', group = '[R]ename' },
+        { '<leader>s', group = '[S]earch' },
+        { '<leader>w', group = '[W]orkspace' },
+        { '<leader>t', group = '[T]oggle' },
+        { '<leader>h', group = 'Git [H]unk', mode = { 'n', 'v' } },
+      }
+    end,
+  },
+}