Swift 6.1 Release

What's Changed

• [swift/main] Remove most consumer functions by @natecook1000 in #733
• [swift/main] Allow captures in lookahead and atomic groups by @natecook1000 in #735
• [swift/main] Support change matching options in Regex refactoring by @Azoy in #739
• main -> swift/main squashed by @milseman in #741
• [swift/main] Add a string-specific search algorithm by @natecook1000 in #747
• [swift/main] Fix word boundary matching in matches(of:) by @natecook1000 in #745
• [swift/main] Add tests for substring searching at substring boundaries by @natecook1000 in #751
• [swift/main] Migrate to internal imports by @tshortli in #756
• Limit recursion in regex parser by @milseman in #757
• [swift/main] Add missing imports of _RegexParser by @tshortli in #764
• Update swift 6.1 by @milseman in #795
• [6.1] Fix repeated case-insensitive ASCII match by @natecook1000 in #801
• [6.1] Add new Unicode 16 Scripts by @Azoy in #808

Full Changelog: swift-6.0.3-RELEASE...swift-6.1-RELEASE