chore(vim): add sidebar.nvim and configuration

nvim/plugins/sidebar.lua

@@ -0,0 +1,9 @@
+local status, sidebar = pcall(require, 'sidebar-nvim')
+if (not status) then return end
+
+sidebar.setup()
+
+--- Mappings
+local opts = { noremap = true, silent = true }
+
+vim.api.nvim_set_keymap('n', '<leader>ts', [[<Cmd>:SidebarNvimToggle<CR>]], opts)