Site reorg: Remove site/ subpath (#306)

Unfortunately, for proper package pathing, need to remove the `site/`
subpath. This includes:
- Moving everything back into root
- Adding a `copy-site.sh` script to copy resources into `mkdocs/site/`
before building the site with mkdocs.
- Also update examples to ensure all are loading the local sw.js / ui.js
- Consolidate examples in `docs/examples`
- Consolidate assets under src/assets/
- Move `favicons` to root
- Reformat and relint
- Tests: update playwright tests to use mkdocs output, add test for
embed in docs
- bump to 2.0.0-beta.2

tests/embeds.spec.js

@@ -14,6 +14,20 @@ test("same-domain embed is loading", async ({ page }) => {
   await expect(res).toContainText("Want to help");
 });
 
+test("docs page embed is loading", async ({ page }) => {
+  await page.goto("http://localhost:9990/docs/embedding/");
+
+  const res = page
+    .locator("replay-web-page")
+    .frameLocator("iframe")
+    .locator("replay-app-main wr-item wr-coll-replay")
+    .frameLocator("iframe")
+    .frameLocator("iframe#twitter-widget-0")
+    .locator("body");
+
+  await expect(res).toContainText("Want to help");
+});
+
 test("cross-domain embed is loading", async ({ page }) => {
   await page.goto("http://localhost:8020/");