add: codeium config

lua/plugins/codeiumnvim.lua

@@ -0,0 +1,27 @@
+if vim.g.pcode_codeium_nvim then
+  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,
+    },
+  }
+else
+  return {}
+end