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/crates.lua

@@ -0,0 +1,73 @@
+return {
+  "saecki/crates.nvim",
+  event = { "BufRead Cargo.toml" },
+  dependencies = { "nvim-lua/plenary.nvim" },
+  opts = {
+    smart_insert = true,
+    insert_closing_quote = true,
+    autoload = true,
+    autoupdate = true,
+    autoupdate_throttle = 250,
+    loading_indicator = true,
+    date_format = "%Y-%m-%d",
+    thousands_separator = ",",
+    notification_title = "crates.nvim",
+    curl_args = { "-sL", "--retry", "1" },
+    max_parallel_requests = 80,
+    open_programs = { "xdg-open", "open" },
+    expand_crate_moves_cursor = true,
+    enable_update_available_warning = true,
+    on_attach = function(bufnr) end,
+    text = {
+      loading = "   Loading",
+      version = "   %s",
+      prerelease = "   %s",
+      yanked = "   %s",
+      nomatch = "   No match",
+      upgrade = "   %s",
+      error = "   Error fetching crate",
+    },
+    highlight = {
+      loading = "CratesNvimLoading",
+      version = "CratesNvimVersion",
+      prerelease = "CratesNvimPreRelease",
+      yanked = "CratesNvimYanked",
+      nomatch = "CratesNvimNoMatch",
+      upgrade = "CratesNvimUpgrade",
+      error = "CratesNvimError",
+    },
+    popup = {
+      autofocus = false,
+      hide_on_select = false,
+      copy_register = '"',
+      style = "minimal",
+      border = "rounded",
+      show_version_date = true,
+      show_dependency_version = true,
+      max_height = 30,
+      min_width = 20,
+      padding = 1,
+    },
+    completion = {
+      cmp = {
+        enabled = true,
+      },
+    },
+    lsp = {
+      enabled = true,
+      on_attach = function(client, bufnr) end,
+      actions = true,
+      completion = true,
+      hover = true,
+    },
+  },
+  keys = {
+    { "<leader>ct", "<cmd>lua require('crates').toggle()<cr>", desc = "Toggle crates" },
+    { "<leader>cr", "<cmd>lua require('crates').reload()<cr>", desc = "Reload crates" },
+    { "<leader>cv", "<cmd>lua require('crates').show_versions_popup()<cr>", desc = "Show versions" },
+    { "<leader>cf", "<cmd>lua require('crates').show_features_popup()<cr>", desc = "Show features" },
+    { "<leader>cd", "<cmd>lua require('crates').show_dependencies_popup()<cr>", desc = "Show dependencies" },
+    { "<leader>cu", "<cmd>lua require('crates').update_crate()<cr>", desc = "Update crate" },
+    { "<leader>cU", "<cmd>lua require('crates').upgrade_crate()<cr>", desc = "Upgrade crate" },
+  },
+}