chore: try folke/sidekick as AI assistant integration

Author: nickgnd

lua/custom/plugins/sidekick.lua

@@ -0,0 +1,79 @@
+-- sidekick.nvim is your Neovim AI sidekick that integrates Copilot LSP's "Next Edit Suggestions" with a built-in terminal for any AI CLI.
+-- https://workeraworkspace.slack.com/archives/C06A563F3P0/p1759230121175309
+
+return {
+  'folke/sidekick.nvim',
+  opts = {
+    -- add any options here
+    cli = {
+      mux = {
+        backend = 'tmux',
+        enabled = true,
+      },
+    },
+  },
+  debug = true,
+  keys = {
+    {
+      '<tab>',
+      function()
+        -- if there is a next edit, jump to it, otherwise apply it if any
+        if not require('sidekick').nes_jump_or_apply() then
+          return '<Tab>' -- fallback to normal tab
+        end
+      end,
+      expr = true,
+      desc = 'Goto/Apply Next Edit Suggestion',
+    },
+    {
+      '<leader>aa',
+      function()
+        require('sidekick.cli').toggle()
+      end,
+      mode = { 'n', 'v' },
+      desc = 'Sidekick Toggle CLI',
+    },
+    {
+      '<leader>as',
+      function()
+        require('sidekick.cli').select()
+      end,
+      -- Or to select only installed tools:
+      -- require("sidekick.cli").select({ filter = { installed = true } })
+      desc = 'Sidekick Select CLI',
+    },
+    {
+      '<leader>as',
+      function()
+        require('sidekick.cli').send { selection = true }
+      end,
+      mode = { 'v' },
+      desc = 'Sidekick Send Visual Selection',
+    },
+    {
+      '<leader>ap',
+      function()
+        require('sidekick.cli').prompt()
+      end,
+      mode = { 'n', 'v' },
+      desc = 'Sidekick Select Prompt',
+    },
+    {
+      '<c-.>',
+      function()
+        require('sidekick.cli').focus()
+      end,
+      mode = { 'n', 'x', 'i', 't' },
+      desc = 'Sidekick Switch Focus',
+    },
+    -- Example of a keybinding to open Claude directly
+    {
+      '<leader>ac',
+      function()
+        require('sidekick.cli').toggle { name = 'claude', focus = true }
+      end,
+      desc = 'Sidekick Claude Toggle',
+      mode = { 'n', 'v' },
+    },
+  },
+}