add a tab manager.

lua/plugins/buffer-tab.lua

@@ -0,0 +1,35 @@
+-- buffer tabs
+--
+return {
+    {
+        "akinsho/bufferline.nvim",
+        version = "*",
+        dependencies = "nvim-tree/nvim-web-devicons",
+        opts = {
+            options = {
+                mode = "buffers",
+                separator_style = "slant",
+                diagnostics = "nvim_lsp",
+                sort_by = "extension",
+                offsets = {
+                    {
+                        filetype = "nerdtree",
+                        text = "File Explorer",
+                        highlight = "Directory",
+                        separator = true,
+                    },
+                },
+                hover = {
+                    enabled = true,
+                    delay = 200,
+                    reveal = { "close" },
+                },
+            },
+        },
+        keys = {
+            { "<Tab>", "<Cmd>BufferLineCycleNext<CR>", desc = "Next Buffer" },
+            { "<S-Tab>", "<Cmd>BufferLineCyclePrev<CR>", desc = "Previous Buffer" },
+            { "<leader>bd", "<Cmd>BufferLinePickClose<CR>", desc = "Close Buffer" },
+        },
+    }
+}