feat(nvim): add claude-code.nvim plugin

Adds greggh/claude-code.nvim with plenary.nvim as a required dependency.
Provides :ClaudeCode toggle, continue/resume/verbose commands, and
<C-,> / <leader>cC keybinds out of the box.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

nvim/init.lua

@@ -37,6 +37,13 @@ require("lazy").setup({
     "nvim-mini/mini.icons",
     "tadmccorkle/markdown.nvim",
     { "ellisonleao/glow.nvim", config = true },
+    {
+        "greggh/claude-code.nvim",
+        dependencies = { "nvim-lua/plenary.nvim" },
+        config = function()
+            require("claude-code").setup()
+        end,
+    },
 }, {
     -- keep lazy's own UI out of the way on first install
     install = { colorscheme = { "habamax" } },