refactor: move sidebar panels into features (#4332)

This removes 2 levels of nested folders for 5 features. Will simplify fs
navigating a lot.

Author: TrySound

apps/builder/app/builder/builder.tsx

@@ -9,7 +9,7 @@ import type { AuthPermit } from "@webstudio-is/trpc-interface/index.server";
 import { createImageLoader } from "@webstudio-is/image";
 import { registerContainers, useBuilderStore } from "~/shared/sync";
 import { startProjectSync, useSyncServer } from "./shared/sync/sync-server";
-import { SidebarLeft } from "./features/sidebar-left";
+import { SidebarLeft } from "./sidebar-left";
 import { Inspector } from "./features/inspector";
 import { Topbar } from "./features/topbar";
 import { Footer } from "./features/footer";

apps/builder/app/builder/features/sidebar-left/panels/assets/assets.tsx renamed to apps/builder/app/builder/features/assets/assets.tsx

@@ -27,7 +27,7 @@ import {
   $dragAndDropState,
   $selectedPage,
 } from "~/shared/nano-states";
-import { NavigatorTree } from "~/builder/features/sidebar-left/panels/navigator";
+import { NavigatorTree } from "~/builder/features/navigator";
 import type { Settings } from "~/builder/shared/client-settings";
 import { MetaIcon } from "~/builder/shared/meta-icon";
 import { getInstanceLabel } from "~/shared/instance-utils";