feat(ai): add codecompanion.nvim as alternative to copilotchat.nvim

lua/lazyvim/plugins/extras/coding/codecompanion.lua

@@ -0,0 +1,47 @@
+return {
+  {
+    "olimorris/codecompanion.nvim",
+    cmd = { "CodeCompanion", "CodeCompanionActions", "CodeCompanionToggle", "CodeCompanionAdd", "CodeCompanionChat" },
+
+    opts = function()
+      local options = require("codecompanion.config")
+      local user = vim.env.USER or "User"
+
+      options.strategies.chat.roles = {
+        llm = "  CodeCompanion",
+        user = "  " .. user:sub(1, 1):upper() .. user:sub(2),
+      }
+
+      options.strategies.chat.keymaps.close.modes = {
+        n = "q",
+        i = "<C-c>",
+      }
+      options.strategies.chat.keymaps.stop.modes.n = "<C-c>"
+      options.strategies.chat.keymaps.send.modes.n = "gS"
+
+      return options
+    end,
+
+    keys = {
+      { "<leader>a", "", desc = "+ai", mode = { "n", "v" } },
+      { "<leader>aA", "<cmd>CodeCompanionActions<cr>", mode = { "n", "v" }, desc = "Prompt Actions (CodeCompanion)" },
+      { "<leader>aa", "<cmd>CodeCompanionToggle<cr>", mode = { "n", "v" }, desc = "Toggle (CodeCompanion)" },
+      { "<leader>ac", "<cmd>CodeCompanionAdd<cr>", mode = "v", desc = "Add code to CodeCompanion" },
+      { "<leader>ap", "<cmd>CodeCompanion<cr>", mode = "n", desc = "Inline prompt (CodeCompanion)" },
+    },
+  },
+
+  -- Edgy integration
+  {
+    "folke/edgy.nvim",
+    optional = true,
+    opts = function(_, opts)
+      opts.right = opts.right or {}
+      table.insert(opts.right, {
+        ft = "codecompanion",
+        title = "CodeCompanion Chat",
+        size = { width = 50 },
+      })
+    end,
+  },
+}