Redirect Apple documentation urls?

[finestructure]

There are doc links out there beyond the control of the repositories themselves that likely won't be updated. It would be helpful if we could redirect from */apple/{repo}/documentation/* to */swiftlang/{repo}/documentation/*.

EDIT: we could just redirect from /apple/{repo}/* to /swiftlang/{repo}/*. No need to make this documentation specific.

We'd have to do that per repository and coordinate with the move.

We're currently indexing the following Apple/Swiftlang packages that opt into documentation hosting:

https://github.com/apple/swift-algorithms.git
https://github.com/apple/swift-argument-parser.git
https://github.com/apple/swift-asn1.git
https://github.com/apple/swift-async-algorithms.git
https://github.com/apple/swift-async-dns-resolver.git
https://github.com/apple/swift-atomics.git
https://github.com/apple/swift-cassandra-client.git
https://github.com/apple/swift-certificates.git
https://github.com/apple/swift-cluster-membership.git
https://github.com/apple/swift-collections.git
https://github.com/apple/swift-distributed-actors.git
https://github.com/apple/swift-distributed-tracing-baggage-core.git
https://github.com/apple/swift-distributed-tracing.git
https://github.com/apple/swift-docc.git
https://github.com/apple/swift-docc-plugin.git
https://github.com/apple/swift-http-structured-headers.git
https://github.com/apple/swift-http-types.git
https://github.com/apple/swift-log.git
https://github.com/apple/swift-markdown.git
https://github.com/apple/swift-metrics-extras.git
https://github.com/apple/swift-metrics.git
https://github.com/apple/swift-mmio.git
https://github.com/apple/swift-nio-extras.git
https://github.com/apple/swift-nio.git
https://github.com/apple/swift-nio-http2.git
https://github.com/apple/swift-nio-ssh.git
https://github.com/apple/swift-nio-ssl.git
https://github.com/apple/swift-nio-transport-services.git
https://github.com/apple/swift-numerics.git
https://github.com/apple/swift-openapi-generator.git
https://github.com/apple/swift-openapi-runtime.git
https://github.com/apple/swift-openapi-urlsession.git
https://github.com/apple/swift-playdate-examples.git
https://github.com/apple/swift-protobuf.git
https://github.com/apple/swift-service-context.git
https://github.com/apple/swift-service-discovery.git
https://github.com/apple/swift-statsd-client.git
https://github.com/apple/swift-system.git
https://github.com/apple/swift-testing.git
https://github.com/swiftlang/indexstore-db.git
https://github.com/swiftlang/sourcekit-lsp.git
https://github.com/swiftlang/swift-format.git
https://github.com/swiftlang/swiftly.git
https://github.com/swiftlang/swift-package-collection-generator.git
https://github.com/swiftlang/swift-package-manager.git
https://github.com/swiftlang/swift-sdk-generator.git
https://github.com/swiftlang/swift-syntax.git
https://github.com/swiftlang/swift-tools-support-core.git

[finestructure]

Unless there's an easier way to do this via Cloudflare, we'd need a bigger plan to support this:

(I cut off the bottom part of the form, the rewrite logic was regex_replace(http.request.uri.path, "^/apple/swift-syntax/", "/swiftlang/swift-syntax/").)