Revert "Remove oil.nvim"

This reverts commit 30880dd786.

nvim/plugin/netrw.lua

@@ -1,3 +1,6 @@
-vim.keymap.set("n", "-", vim.cmd.Ex)
+vim.keymap.set("n", "<leader>pv", vim.cmd.Ex)
 
 vim.g.netrw_banner = 0
+vim.g.netrw_browse_split = 0
+vim.g.netrw_liststyle = 3
+vim.g.netrw_winsize = 20

nvim/plugin/oil.lua

@@ -0,0 +1,16 @@
+require("oil").setup {
+  columns = { "icon" },
+
+  keymaps = {
+    ["<C-h>"] = false,
+    ["<M-h>"] = "actions.select_split",
+  },
+
+  skip_confirm_for_simple_edits = true,
+
+  view_options = {
+    show_hidden = true,
+  },
+}
+
+vim.keymap.set("n", "-", "<Cmd>Oil<cr>", { desc = "Open parent directory" })