[docs] Improve XML docs for SKReceiptProperties

[rolfbjarne]

Improve XML documentation for the SKReceiptProperties type:

• Replace 'To be added.' placeholders with meaningful descriptions
• Fix see cref reference to SKReceiptRefreshRequest
• Remove empty <remarks> nodes
• Add proper documentation for constructors and properties

🤖 Pull request created by Copilot

[Copilot]

Pull request overview

Improves the XML documentation for StoreKit.SKReceiptProperties, clarifying constructor/property docs and cleaning up placeholder/empty XML nodes so generated API docs are more useful and accurate.

Changes:

• Replaced placeholder XML doc text with meaningful summaries/values for constructors and properties.
• Simplified/fixed the see cref reference for SKReceiptRefreshRequest.
• Removed empty <remarks> nodes.

[vs-mobiletools-engineering-service2]

✅ [PR Build #64abd74] Build passed (Build packages) ✅

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Hash: 64abd743c80e99c3c0c2b24b5ce9627f49b90df5 [PR build]

[vs-mobiletools-engineering-service2]

✅ [PR Build #64abd74] Build passed (Build macOS tests) ✅

Pipeline on Agent
Hash: 64abd743c80e99c3c0c2b24b5ce9627f49b90df5 [PR build]

[vs-mobiletools-engineering-service2]

🚀 [CI Build #64abd74] Test results 🚀

Test results

✅ All tests passed on VSTS: test results.

🎉 All 207 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. [attempt 4] 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 4 tests passed. Html Report (VSDrops) Download
✅ linker (iOS): All 15 tests passed. Html Report (VSDrops) Download
✅ linker (MacCatalyst): All 15 tests passed. Html Report (VSDrops) Download
✅ linker (macOS): All 21 tests passed. Html Report (VSDrops) Download
✅ linker (tvOS): All 15 tests passed. [attempt 2] Html Report (VSDrops) Download
✅ monotouch (iOS): All 20 tests passed. Html Report (VSDrops) Download
✅ monotouch (MacCatalyst): All 19 tests passed. Html Report (VSDrops) Download
✅ monotouch (macOS): All 20 tests passed. Html Report (VSDrops) Download
✅ monotouch (tvOS): All 20 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 Monterey (12): All 5 tests passed. Html Report (VSDrops) Download
✅ Tests on macOS Ventura (13): All 5 tests passed. Html Report (VSDrops) Download
✅ 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: 64abd743c80e99c3c0c2b24b5ce9627f49b90df5 [PR build]

[vs-mobiletools-engineering-service2]

✅ [PR Build #64abd74] Build passed (Detect API changes) ✅

Pipeline on Agent
Hash: 64abd743c80e99c3c0c2b24b5ce9627f49b90df5 [PR build]

[vs-mobiletools-engineering-service2]

✅ API diff for current PR / commit

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 )

✅ 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: 64abd743c80e99c3c0c2b24b5ce9627f49b90df5 [PR build]