Outdated QuickStart contribution page should be removed and redirected

[ZevEisenberg]

Describe the bug

The QuickStart contribution page at https://www.swift.org/quickstart-contribution/ includes references to Xcode 11 and other software from 2019, and a now-dead link to a 2019 toolchain build. The whole page should be deleted, and redirected to the current getting-started resources.

To Reproduce

I'm not actually sure where I found a link to this page, because when I went to search for it on the swift.org website, I couldn't find any pages that link to it. But it's the first Google search result for swift quick start contribution, and I'm guessing other Google search phrases of a similar nature will result in this page as well.

Expected behavior

When searching for how to build or contribute to the Swift compiler or standard library, I should be led to an up-to-date, informative page such as https://www.swift.org/contributing/, https://github.com/swiftlang/swift?tab=readme-ov-file#contributing-to-swift, or https://github.com/swiftlang/swift/blob/main/docs/HowToGuides/GettingStarted.md.

If I do end up finding an old link to https://www.swift.org/quickstart-contribution/, I expect that it would redirect to something more modern.

Actual behavior

I found myself at https://www.swift.org/quickstart-contribution/, which is out of date and not that helpful to me as a newcomer to the project.

Environment details

Desktop

• OS: macOS
• Browser Safari
• Version 18.3.1

If possible, minimal yet complete reproducer code (or link to code)

https://github.com/swiftlang/swift-org-website/blob/main/quickstart-contribution/index.md

Swift.org version/commit hash

The file in question was last modified in commit 89dc30a