* Switches all examples to use dev-infra's canonical ESM-compatible
`http_server`.
* Uses ESBuild for bundling ESM into a single file, compared to having
to load hundreds of individual ESM files in the browser (potential
source of flakiness & slowness).
PR Close#48521
Previously, the `SwPush` API docs were using hard-coded code snippets.
This commit switches to using code snippets from an actual example app,
which ensures that the code shown in the docs will at least continue to
compile successfully.
PR Close#32139
