replace some more plugins with lua variants

lua/plugins/nvim-tree.lua

@@ -0,0 +1,33 @@
+local tree_cb  = require('nvim-tree.config').nvim_tree_callback
+
+require("nvim-tree").setup {
+  auto_close = true,
+  view = {
+    width = "15%",
+    side = "left",
+    mappings = {
+      custom_only = true,
+      list = {
+        { key = {"<CR>", "<2-LeftMouse>"}, cb = tree_cb("edit") },
+        { key = "vs",                        cb = tree_cb("vsplit") },
+        { key = "s",                        cb = tree_cb("split") },
+        { key = "t",                        cb = tree_cb("tabnew") },
+        { key = "<Tab>",                        cb = tree_cb("preview") },
+        { key = "K",                            cb = tree_cb("first_sibling") },
+        { key = "J",                            cb = tree_cb("last_sibling") },
+        { key = "R",                            cb = tree_cb("refresh") },
+        { key = "ma",                            cb = tree_cb("create") },
+        { key = "md",                            cb = tree_cb("remove") },
+        { key = "mm",                            cb = tree_cb("rename") },
+        { key = "<C-r>",                        cb = tree_cb("full_rename") },
+        { key = "mc",                            cb = ':lua require"nvim-tree".on_keypress("copy");require"nvim-tree".on_keypress("paste")<CR>' },
+        { key = "?",                           cb = tree_cb("toggle_help") },
+      }
+    }
+  }
+}
+
+
+
+-- Hide statusline in nvim-tree buffer/tabs.
+-- vim.cmd('au BufEnter,BufWinEnter,WinEnter,CmdwinEnter * if bufname("%") == "NvimTree" | set laststatus=0 | else | set laststatus=2 | endif')