feat: Swift/SwiftUI coverage in platform-native.md

[systemblueio]

docs/platform-native.md covers HTML, CSS, JS, Node, Python, and databases, but there's no Apple/Swift section, and none of the examples are Swift. On Apple platforms the "does the platform already do this?" rung is especially rich, so the gap is worth filling.

Proposed rows for a Swift / SwiftUI section:

You think you need	What the platform has
Date/time picker library	DatePicker
Pull-to-refresh library	.refreshable { }
Search bar component	.searchable(text:)
Image loading/caching library	AsyncImage
JSON parsing library	Codable
HTTP client (Alamofire)	URLSession async/await
Charting library	Swift Charts
Number/date formatting library	.formatted() / FormatStyle
Markdown renderer	AttributedString(markdown:)
Share sheet wrapper	ShareLink
Persistence/ORM	SwiftData / @AppStorage
Loading spinner	ProgressView

Happy to send a PR with this section plus a Swift example or two (a native DatePicker over a calendar lib reads well) if it fits the scope you want for the doc.

[systemblueio]

UPDATE: here's the concrete section, written to drop into docs/platform-native.md in the same format as the existing ones (two tables, since Apple platforms split cleanly into SwiftUI controls and the Swift/framework layer). Carve-outs for libraries that genuinely earn their place are kept inline, matching the ms / requests style already in the doc.

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Swift / SwiftUI

UI components people reach for a library or a custom view for.

You think you need	What the platform has
Date/time picker library	DatePicker
Color picker library	ColorPicker
Search bar + filtering	.searchable(text:)
Pull-to-refresh library	.refreshable { }
Swipe-to-delete / row actions	.swipeActions { }
Async image loading + cache	AsyncImage
Charting library	Swift Charts (import Charts)
Markdown rendering	Text(...) markdown / AttributedString(markdown:)
Share sheet wrapper	ShareLink
Loading spinner	ProgressView()
Photo picker	PhotosPicker
Map SDK (basic)	Map (MapKit for SwiftUI)
Grid layout library	Grid / LazyVGrid

Frameworks and stdlib that wrappers wrap.

You think you need	What the platform has
JSON library (SwiftyJSON)	Codable + JSONDecoder / JSONEncoder
HTTP client (Alamofire, simple use)	URLSession async/await; Alamofire earns it for complex retry/multipart at scale
Date/number/currency formatting	.formatted() / FormatStyle
Regex library	Swift regex literals + Regex
Crypto library (CryptoSwift)	CryptoKit
Keychain wrapper	Security SecItem; a few lines, not a dependency
Persistence / ORM	SwiftData, or @AppStorage for small key-values
Logging library	Logger (os.log)
UUID / Base64 helpers	UUID(), Data(...).base64EncodedString()
Image downsampling	ImageIO CGImageSourceCreateThumbnailAtIndex
Combine wrappers for async	async/await + AsyncSequence

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If the scope looks right, the PR would add this section plus one example under examples/ in the existing style (a native DatePicker over a hand-built calendar reads well). Glad to trim or reshape either table first.

[DietrichGebert]

Merged in #313. Format matches the rest of the doc and the Swift built-ins are all correct. Thanks.