[AppKit] Document ten enum types

[rolfbjarne]

Document ten AppKit enum types and all their members:

• NSCollectionViewDropOperation
• NSUserInterfaceLayoutOrientation
• NSSliderType
• NSPopoverAppearance
• NSTableViewRowActionStyle
• NSWindowTitleVisibility
• NSVisualEffectBlendingMode
• NSStatusItemBehavior
• NSTouchType
• NSTouchTypeMask

Remove the matching entries from the Cecil documentation known-failures list.

🤖 Pull request created by Copilot

[Copilot]

🟢 Approval recommended

The changes are documentation-only and the known-failures list updates match the newly documented enum types.

Pull request overview

This PR improves the AppKit binding documentation by adding XML documentation for ten existing enum types (and their members) in src/AppKit/Enums.cs, and then removing those enums from the Cecil documentation known-failures list so the documentation tests can enforce the new coverage.

Changes:

• Added XML <summary> documentation for 10 AppKit enums and their members in src/AppKit/Enums.cs.
• Removed the corresponding enum entries from tests/cecil-tests/Documentation.KnownFailures.txt to reflect the improved documentation coverage.

File summaries

File	Description
src/AppKit/Enums.cs	Adds enum/member XML documentation for the specified AppKit enum types.
tests/cecil-tests/Documentation.KnownFailures.txt	Drops known-failure entries for those enums so Cecil doc validation expects them to be documented.

Review details

• Files reviewed: 2/2 changed files
• Comments generated: 1
• Review effort level: Lite

[vs-mobiletools-engineering-service2]

✅ API diff for current PR / commit

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• iOS: vsdrops gist ( No breaking changes )
• tvOS: vsdrops gist ( No breaking changes )
• MacCatalyst: vsdrops gist ( No breaking changes )
• macOS: vsdrops gist ( No breaking changes )

✅ API diff vs stable

NET (empty diffs)

• iOS: vsdrops gist ( No breaking changes )
• tvOS: vsdrops gist ( No breaking changes )
• MacCatalyst: vsdrops gist ( No breaking changes )
• macOS: vsdrops gist ( No breaking changes )

ℹ️ Generator diff

Generator Diff: vsdrops (html) vsdrops (raw diff) gist (raw diff) - Please review changes)

Pipeline on Agent
Hash: b4a71684d417d4c0f854054ea7f47c91301141de [PR build]

[vs-mobiletools-engineering-service2]

🚀 [CI Build #b4a7168] Test results 🚀

Test results

✅ All tests passed on VSTS: test results.

🎉 All 264 tests passed 🎉

Tests counts

✅ assembly-processing: All 1 tests passed. Html Report (VSDrops) Download
✅ cecil: All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (iOS): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (MacCatalyst): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (macOS): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (Multiple platforms): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (tvOS): All 1 tests passed. Html Report (VSDrops) Download
✅ framework: All 2 tests passed. Html Report (VSDrops) Download
✅ fsharp: All 4 tests passed. Html Report (VSDrops) Download
✅ generator: All 5 tests passed. Html Report (VSDrops) Download
✅ interdependent-binding-projects: All 4 tests passed. Html Report (VSDrops) Download
✅ introspection: All 7 tests passed. Html Report (VSDrops) Download
✅ linker (iOS): All 31 tests passed. Html Report (VSDrops) Download
✅ linker (MacCatalyst): All 31 tests passed. Html Report (VSDrops) Download
✅ linker (macOS): All 21 tests passed. Html Report (VSDrops) Download
✅ linker (tvOS): All 31 tests passed. Html Report (VSDrops) Download
✅ monotouch (iOS): All 25 tests passed. Html Report (VSDrops) Download
✅ monotouch (MacCatalyst): All 25 tests passed. Html Report (VSDrops) Download
✅ monotouch (macOS): All 20 tests passed. Html Report (VSDrops) Download
✅ monotouch (tvOS): All 25 tests passed. Html Report (VSDrops) Download
✅ msbuild: All 2 tests passed. Html Report (VSDrops) Download
✅ sharpie: All 1 tests passed. Html Report (VSDrops) Download
✅ windows: All 3 tests passed. Html Report (VSDrops) Download
✅ xcframework: All 4 tests passed. Html Report (VSDrops) Download
✅ xtro: All 1 tests passed. Html Report (VSDrops) Download

macOS tests

✅ Tests on macOS Sonoma (14): All 5 tests passed. Html Report (VSDrops) Download
✅ Tests on macOS Sequoia (15): All 5 tests passed. Html Report (VSDrops) Download
✅ Tests on macOS Tahoe (26): All 5 tests passed. Html Report (VSDrops) Download

Linux Build Verification

✅ Linux build succeeded

Pipeline on Agent
Hash: b4a71684d417d4c0f854054ea7f47c91301141de [PR build]