Add nvim-tree setup

templates/nvim/lua/keybindings.lua.j2

@@ -1,6 +1,6 @@
 local opts = {noremap=true, silent=true}
 
-vim.api.nvim_set_keymap('n', '<C-E>', '<cmd>:NERDTreeToggle<CR>', opts)
+vim.api.nvim_set_keymap('n', '<C-E>', '<cmd>:NvimTreeToggle<CR>', opts)
 vim.api.nvim_set_keymap('n', 'ff', '<cmd>lua require("telescope.builtin").find_files()<CR>', opts)
 vim.api.nvim_set_keymap('n', 'fg', '<cmd>lua require("telescope.builtin").live_grep()<CR>', opts)
 vim.api.nvim_set_keymap('n', 'fb', '<cmd>lua require("telescope.builtin").buffers()<CR>', opts)

templates/nvim/lua/nvim-tree.lua.j2

@@ -0,0 +1,18 @@
+local nvim_tree = require('nvim-tree');
+
+nvim_tree.setup {
+  renderer = {
+    icons = {
+      show = {
+        file = false,
+        folder = false,
+        modified = false,
+        hidden = false,
+        diagnostics = false,
+        bookmarks = false,
+        git = false,
+        folder_arrow = false
+      }
+    }
+  }
+}

templates/nvim/lua/options.lua.j2

@@ -55,5 +55,9 @@ vim.o.background = 'light'
 vim.o.laststatus = 2
 vim.o.statusline = ' %F %m%r%w %= %{hostname()}   %{strlen(&ft)?&ft:"none"} %{(&bomb?",BOM":"")} %{&ff}  %l/%L  %c %P'
 
+-- use a dedicated file explorer
+vim.g.loaded_netrw = 1
+vim.g.loaded_netrwPlugin = 1
+
 -- python interpreter
 vim.g.python3_host_prog = './env/bin/python'