feat(ai): move ai related extras from coding to ai (#4751)

## Description

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  why we should accept this pull request. -->

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  - Fixes #<issue_number>
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## Checklist

- [ ] I've read the
[CONTRIBUTING](https://github.com/LazyVim/LazyVim/blob/main/CONTRIBUTING.md)
guidelines.

lua/lazyvim/plugins/extras/ai/codeium.lua

@@ -0,0 +1,33 @@
+return {
+
+  -- codeium cmp source
+  {
+    "nvim-cmp",
+    dependencies = {
+      -- codeium
+      {
+        "Exafunction/codeium.nvim",
+        cmd = "Codeium",
+        build = ":Codeium Auth",
+        opts = {},
+      },
+    },
+    ---@param opts cmp.ConfigSchema
+    opts = function(_, opts)
+      table.insert(opts.sources, 1, {
+        name = "codeium",
+        group_index = 1,
+        priority = 100,
+      })
+    end,
+  },
+
+  {
+    "nvim-lualine/lualine.nvim",
+    optional = true,
+    event = "VeryLazy",
+    opts = function(_, opts)
+      table.insert(opts.sections.lualine_x, 2, LazyVim.lualine.cmp_source("codeium"))
+    end,
+  },
+}