plugins, keymaps + fix formatting

lua/custom/plugins/undotree.lua

@@ -0,0 +1,32 @@
+local M = {
+  'jiaoshijie/undotree',
+  dependencies = 'nvim-lua/plenary.nvim',
+  config = true,
+  keys = { -- load the plugin only when using it's keybinding:
+    { '<leader>u', "<cmd>lua require('undotree').toggle()<cr>" },
+  },
+}
+
+function M.config()
+  require('undotree').setup({
+    float_diff = true,      -- using float window previews diff, set this `true` will disable layout option
+    layout = 'left_bottom', -- "left_bottom", "left_left_bottom"
+    position = 'left',      -- "right", "bottom"
+    ignore_filetype = { 'NvimTree', 'fugitive', 'undotree', 'undotreeDiff', 'qf', 'TelescopePrompt', 'spectre_panel', 'tsplayground' },
+    window = {
+      winblend = 30,
+    },
+    keymaps = {
+      ['j'] = 'move_next',
+      ['k'] = 'move_prev',
+      ['gj'] = 'move2parent',
+      ['J'] = 'move_change_next',
+      ['K'] = 'move_change_prev',
+      ['<cr>'] = 'action_enter',
+      ['p'] = 'enter_diffbuf',
+      ['q'] = 'quit',
+    },
+  })
+end
+
+return M