feat: add Tabnine

Add TabNine plugin for hrsh7th/nvim-cmp

lua/lazyvim/plugins/extras/coding/tabnine.lua

@@ -0,0 +1,69 @@
+return {
+  {
+    "nvim-cmp",
+    dependencies = {
+      -- Add TabNine source, make sure you run :CmpTabnineHub after installation.
+      {
+        "tzachar/cmp-tabnine",
+        build = "./install.sh",
+        dependencies = "hrsh7th/nvim-cmp",
+        -- Only limit top 3 sources, refer https://github.com/tzachar/cmp-tabnine?tab=readme-ov-file#setup
+        opts = { max_lines = 1000, max_num_results = 3, sort = true },
+      },
+    },
+    ---@param opts cmp.ConfigSchema
+    opts = function(_, opts)
+      table.insert(opts.sources, 1, {
+        name = "cmp_tabnine",
+        group_index = 1,
+        priority = 100,
+      })
+    end,
+  },
+
+  {
+    "nvim-lualine/lualine.nvim",
+    optional = true,
+    event = "VeryLazy",
+    opts = function(_, opts)
+      local started = false
+      local function status()
+        if not package.loaded["cmp"] then
+          return
+        end
+        for _, s in ipairs(require("cmp").core.sources) do
+          if s.name == "cmp_tabnine" then
+            if s.source:is_available() then
+              started = true
+            else
+              return started and "error" or nil
+            end
+            if s.status == s.SourceStatus.FETCHING then
+              return "pending"
+            end
+            return "ok"
+          end
+        end
+      end
+
+      local Util = require("lazyvim.util")
+      local colors = {
+        ok = Util.fg("Special"),
+        error = Util.fg("DiagnosticError"),
+        pending = Util.fg("DiagnosticWarn"),
+      }
+      table.insert(opts.sections.lualine_x, 3, {
+        function()
+          -- TODO: return TabNine icon if TabNine is available
+          return ""
+        end,
+        cond = function()
+          return status() ~= nil
+        end,
+        color = function()
+          return colors[status()] or colors.ok
+        end,
+      })
+    end,
+  },
+}