Feature/pilot swift extension plugin

[js-bonin]

Add a Gradle plugin to distribute Swift extensions without CocoaPods

Summary

Adds pilot-swift-extensions-plugin, a new Gradle plugin module that packages Pilot's iOS Swift extensions (viewmodel/ios/, components/ios/base/, components/ios/kingfisher/) into its own plugin JAR and syncs them into a consumer's project at build time — as an alternative to Pilot.podspec for apps that have moved off CocoaPods to Swift Package Manager.

Modeled directly on Trikot's existing com.mirego.trikot.swift-extensions plugin (same shape: an extension block for frameworkName/outputDir/modules, and a syncPilotSwiftExtensions task that reads the plugin's own JAR resources — no network fetch at consumer build time).

What's included

• New module: pilot-swift-extensions-plugin/ (PilotSwiftExtensionsPlugin, PilotSwiftExtensionsExtension, SyncSwiftExtensionsTask), registered in settings.gradle.kts.
• Configurable framework name: consumers no longer need their KMP framework to be literally named Shared (previously hard-required via spec.dependency "Shared" in the podspec). A PILOT_FRAMEWORK_NAME placeholder is substituted with the consumer's configured name — matching Trikot's own flexibility.
• Podspec/CocoaPods consumers are unaffected: the placeholder substitution happens only while the plugin packages its own resources (processResources filter in pilot-swift-extensions-plugin/build.gradle.kts), not in the checked-in source files. Pilot.podspec still reads import Shared exactly as before — verified via diff and an end-to-end test.

Test plan

• :pilot-swift-extensions-plugin:build passes (including ktlint)
• Published to mavenLocal() and consumed from a real throwaway Gradle project — confirmed syncPilotSwiftExtensions extracts all 20 files, correctly substitutes PILOT_FRAMEWORK_NAME → the configured name
• Diffed generated output against the original source files — byte-for-byte identical aside from the import line
• Verified module filtering (modules.set(listOf("viewmodel")) syncs only that module) and stale-file cleanup (switching modules removes previously-synced files/directories)
• Confirmed the checked-in Swift source files (and therefore Pilot.podspec) are untouched — still import Shared
• Full project build (./gradlew build) still passes

[G-lalonde]

Niiiiiice!