Editor Redesign Cleanup: main layout, toolbar, and rail (#31031)

* feat: integrate  main layout, toolbar, and rail from redesign into main ide-react folder

* feat: remove additional files no longer used after ide redesign

GitOrigin-RevId: 8fd77f63cb9c67be91995a9dde13b0fe2376d80f

services/web/frontend/js/features/ide-react/util/rail-types.ts

@@ -0,0 +1,19 @@
+import { AvailableUnfilledIcon } from '@/shared/components/material-icon'
+import { RailTabKey } from '../context/rail-context'
+import { FC, ReactElement } from 'react'
+import RailTab from '@/features/ide-react/components/rail/rail-tab'
+
+export type CustomRailTabIcon = FC<{ open: boolean; title: string }>
+
+export type RailElement = {
+  icon: AvailableUnfilledIcon | CustomRailTabIcon
+  key: RailTabKey
+  component: ReactElement | null
+  indicator?: ReactElement
+  title: string
+  hide?: boolean | (() => boolean)
+  disabled?: boolean
+  mountOnFirstLoad?: boolean
+  ref?: React.RefObject<HTMLAnchorElement>
+  tab?: typeof RailTab
+}

services/web/frontend/js/features/ide-react/util/rail-utils.ts

@@ -0,0 +1,10 @@
+export function shouldIncludeElement({
+  hide,
+}: {
+  hide?: boolean | (() => boolean)
+}): boolean {
+  if (typeof hide === 'function') {
+    return !hide()
+  }
+  return !hide
+}