Revert "Remove nvim-tree"

This reverts commit e5146fbaa4b222d128a338953d0557045a55df29.

lua/plugins/config/tree.lua

@@ -0,0 +1,72 @@
+--[[
+    Copyright 2023 Oscar Wallberg
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        https://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+]]
+
+-- https://github.com/nvim-tree/nvim-tree.lua
+
+require("nvim-tree").setup({
+    sync_root_with_cwd = true,
+    view = {
+        width = 40,
+        preserve_window_proportions = true,
+    },
+    renderer = {
+        add_trailing = true,
+        group_empty = true,
+        highlight_git = true,
+        indent_markers = {
+            enable = true,
+        },
+        icons = {
+            git_placement = "after",
+            show = {
+                folder_arrow = true,
+            },
+        },
+    },
+    update_focused_file = {
+        enable = true,
+        update_root = true,
+        ignore_list = {
+            "help",
+        },
+    },
+    diagnostics = {
+        enable = true,
+        show_on_dirs = false,
+    },
+    actions = {
+        change_dir = {
+            enable = false,
+        },
+        open_file = {
+            resize_window = true,
+        },
+    },
+    filters = {
+        custom = { "^\\.git$", },
+    },
+    notify = {
+        threshold = vim.log.levels.WARN,
+        absolute_path = false,
+    },
+})
+
+local opts = { remap = false, silent = true, }
+vim.keymap.set(
+    "n", "<leader>tt",
+    function () require("nvim-tree.api").tree.toggle() end,
+    opts
+)

lua/plugins/init.lua

@@ -177,6 +177,10 @@ local plugins = {
         lazy = true,
         ft = { "jenkinsfile", "Jenkinsfile", },
     },
+    {
+        "kyazdani42/nvim-tree.lua",
+        config = function () require("plugins.config.tree") end,
+    },
     {
         "dstein64/vim-startuptime",
         lazy = true,