Update avante config to use copilot

lua/plugins/avante.lua

@@ -3,7 +3,10 @@ return {
   event = "VeryLazy",
   lazy = false,
   opts = {
-    -- add any opts here
+    provider = "copilot", -- work is paying for this so it's free for me
+    copilot = {
+      model = "claude-3.7-sonnet",
+    },
   },
   keys = {
     {
@@ -32,11 +35,13 @@ return {
   },
   build = "make",
   dependencies = {
+    "nvim-treesitter/nvim-treesitter",
     "stevearc/dressing.nvim",
     "nvim-lua/plenary.nvim",
     "MunifTanjim/nui.nvim",
     --- The below dependencies are optional,
     "nvim-tree/nvim-web-devicons", -- or echasnovski/mini.icons
+    "zbirenbaum/copilot.lua", -- for providers='copilot'
     {
       -- support for image pasting
       "HakonHarnes/img-clip.nvim",