feat(ai): add support for additional actions

[AnthonyLenglet]

Description

Adds support for prompts such as:

• "Add more like this" -> adds more songs like the currently playing track in the queue (sourced from the mix playlist)
• "Add some " -> adds some of the artist's top songs to the queue instead of doing a basic youtube search for the artist's name
• "Remove from queue" -> removes specific tracks from the queue
• "Remove duplicates from queue" -> self-explanatory, removes the duplicates

Unsure if this needs to be split into multiple PR ?

Type of Change

• 🐛 Bug fix (non-breaking change that fixes an issue)
• ✨ New feature (non-breaking change that adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to change)
• 📚 Documentation update
• 🎨 UI/UX improvement
• ♻️ Refactoring (no functional changes)
• 🧪 Test update
• 🔧 Build/CI configuration

Related Issues

Fixes #342

Changes Made

• feat(ai): handle "more like this" prompts
• feat(ai): handle "remove X from queue" prompts
• feat(ai): open-ended "add some to queue" prompts use the artist's mix instead of search
• feat(ai): add support for "remove duplicates from queue" style prompts

Testing

• Unit tests pass (xcodebuild test -only-testing:KasetTests)
• Manual testing performed
• UI tested on macOS 26+

Checklist

• My code follows the project's style guidelines
• I have run swiftlint --strict && swiftformat .
• I have added tests that prove my fix/feature works
• New and existing unit tests pass locally
• I have updated documentation if needed
• I have checked for any performance implications
• My changes generate no new warnings

Screenshots

"add more songs like this to the queue"
current result	new result

"remove the weeknd from the queue"
current result	new result

"Remove duplicates from queue"
current result	new result

Additional Notes

I seem to be hitting the 12 seconds timeout barrier when doing any action with it, though this happens on both the current release and the main branch, might be due to my mac being an M1 ?

[AnthonyLenglet]

I've disallowed removing the currently playing track when clearing tracks from the queue, fixing the bug shown in the "remove the weeknd from the queue" test case, where the track that was currently playing got removed

should all be good, ideally this PR could use a check on a mac m2 or newer, to make sure the timeout being hit is purely an m1 thing