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/treesj.lua

@@ -0,0 +1,18 @@
+return {
+  "Wansmer/treesj",
+  dependencies = { "nvim-treesitter/nvim-treesitter" },
+  keys = {
+    { "<leader>tj", "<cmd>TSJToggle<cr>", desc = "Toggle split/join" },
+    { "<leader>ts", "<cmd>TSJSplit<cr>", desc = "Split code block" },
+    { "<leader>tJ", "<cmd>TSJJoin<cr>", desc = "Join code block" },
+  },
+  opts = {
+    use_default_keymaps = false,
+    check_syntax_error = true,
+    max_join_length = 120,
+    cursor_behavior = "hold",
+    notify = true,
+    dot_repeat = true,
+    on_error = nil,
+  },
+}