Fix: Sync examples from v0/ and v1/ after repo restructure

[rahulshendre]

What this does

After pipe-cd/pipecd#7173 split the examples into v0/ and v1/, this sync workflow was still copying the old top-level directories (cloudrun, kubernetes, ecs, ...) which no longer exist at that path. So the hourly cron would fail.

This updates the sync to copy examples/v0 and examples/v1 from the main repo instead.

Notes

• it also adds kubernetes_multicluster, which the old explicit list wasn't copying.
• README.remote.md -> README.md behaviour is unchanged.
• Once this is merged and runs, I'll follow up separately to update the docs-dev/examples/_index.md links to point at the new v0/ paths (ref Prepare examples for pipedv1 pipecd#6266).

cc @khanhtc1202

[khanhtc1202]

lgtm, thanks 👍