[big chore] restore core to monorepo (#287)

* move core into repo, apps into apps folder, update tests

* Update scripts for build:core

* improve scripts

* remove noise from www

* Update .gitignore

* Fix focus bug

* add ci test script

* Update main.yml

apps/www/components/Editor.tsx

@@ -0,0 +1,47 @@
+import { Tldraw, TldrawApp, useFileSystem } from '@tldraw/tldraw'
+import * as gtag from '-utils/gtag'
+import React from 'react'
+import { useAccountHandlers } from '-hooks/useAccountHandlers'
+
+declare const window: Window & { app: TldrawApp }
+
+interface EditorProps {
+  id?: string
+  isUser?: boolean
+  isSponsor?: boolean
+}
+
+export default function Editor({ id = 'home', isSponsor = false }: EditorProps) {
+  const handleMount = React.useCallback((app: TldrawApp) => {
+    window.app = app
+  }, [])
+
+  // Send events to gtag as actions.
+  const handlePersist = React.useCallback((_app: TldrawApp, reason?: string) => {
+    gtag.event({
+      action: reason,
+      category: 'editor',
+      label: reason || 'persist',
+      value: 0,
+    })
+  }, [])
+
+  const fileSystemEvents = useFileSystem()
+
+  const { onSignIn, onSignOut } = useAccountHandlers()
+
+  return (
+    <div className="tldraw">
+      <Tldraw
+        id={id}
+        autofocus
+        onMount={handleMount}
+        onPersist={handlePersist}
+        showSponsorLink={!isSponsor}
+        onSignIn={isSponsor ? undefined : onSignIn}
+        onSignOut={onSignOut}
+        {...fileSystemEvents}
+      />
+    </div>
+  )
+}