Move NvimTree file explorer to left side

- Change side from 'right' to 'left' in nvim-tree.lua
  - Update edgy.nvim config to place NvimTree in left panel

lua/cargdev/plugins/undotree.lua

@@ -0,0 +1,24 @@
+return {
+  "mbbill/undotree",
+  cmd = "UndotreeToggle",
+  keys = {
+    { "<leader>tu", "<cmd>UndotreeToggle<cr>", desc = "Toggle Undotree" },
+  },
+  config = function()
+    vim.g.undotree_WindowLayout = 2
+    vim.g.undotree_SplitWidth = 35
+    vim.g.undotree_DiffpanelHeight = 10
+    vim.g.undotree_SetFocusWhenToggle = 1
+    vim.g.undotree_ShortIndicators = 1
+    vim.g.undotree_TreeNodeShape = "◉"
+    vim.g.undotree_TreeVertShape = "│"
+    vim.g.undotree_TreeSplitShape = "╱"
+    vim.g.undotree_TreeReturnShape = "╲"
+    vim.g.undotree_DiffAutoOpen = 1
+    vim.g.undotree_HighlightChangedText = 1
+    vim.g.undotree_HighlightChangedWithSign = 1
+    vim.g.undotree_HighlightSyntaxAdd = "DiffAdd"
+    vim.g.undotree_HighlightSyntaxChange = "DiffChange"
+    vim.g.undotree_HighlightSyntaxDel = "DiffDelete"
+  end,
+}