feat(completion): add codeium-cmp plugin

lua/astrocommunity/completion/codeium-nvim/README.md

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+# codeium-nvim
+
+A native neovim extension for Codeium
+
+Usage:
+
+- `:Codeium Auth` - to set up the plugin
+- `:Codeium Chat` - Open chat in browser
+
+**Repository**: <https://github.com/Exafunction/codeium.nvim>

lua/astrocommunity/completion/codeium-nvim/init.lua

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+return {
+  {
+    "Exafunction/codeium.nvim",
+    opts = {
+      enable_chat = true,
+    },
+    dependencies = {
+      "AstroNvim/astrocore",
+      ---@param opts AstroCoreOpts
+      opts = {
+        mappings = {
+          n = {
+            ["<Leader>;"] = {
+              name = " Codeium",
+            },
+            ["<Leader>;o"] = {
+              desc = "Open Chat",
+              function() vim.cmd "Codeium Chat" end,
+            },
+          },
+        },
+      },
+    },
+  },
+  {
+    "hrsh7th/nvim-cmp",
+    optional = true,
+    dependencies = { "Exafunction/codeium.nvim" },
+    opts = function(_, opts)
+      -- Inject codeium into cmp sources, with high priority
+      table.insert(opts.sources, 1, {
+        name = "codeium",
+        group_index = 1,
+        priority = 10000,
+      })
+    end,
+  },
+  {
+    "onsails/lspkind.nvim",
+    optional = true,
+    -- Adds icon for codeium using lspkind
+    opts = function(_, opts) opts.symbol_map = { Codeium = "" } end,
+  },
+  {
+    "AstroNvim/astrocore",
+    ---@param opts AstroCoreOpts
+    opts = function(_, opts)
+      return require("astrocore").extend_tbl(opts, {
+        mappings = {
+          n = {
+            ["<Leader>;"] = {
+              name = " Codeium",
+            },
+            ["<Leader>;o"] = {
+              desc = "Open Chat",
+              function() vim.cmd "Codeium Chat" end,
+            },
+            ["<Leader>;a"] = {
+              desc = "Auth",
+              function() vim.cmd "Codeium Auth" end,
+            },
+          },
+        },
+      })
+    end,
+  },
+}