Bridge No-Codes loadScreen, defaultVariables and custom action event (DEV-1191)

[SpertsyanKM]

Brings the No-Codes API from sandwich 7.10.1 (native iOS 6.13.0 / Android nocodes 1.10.0) into the Capacitor layer.

DEV-1191

Changes

• Sandwich bump 7.9.0 → 7.10.1 (podspec + gradle).
• NoCodes.loadScreen(contextKey): Promise<NoCodesScreen> — load-before-present; the screen model exposes id, contextKey, defaultSelectedProductId and typed defaultVariables (kind/key/type/value/stringValue) with a defaultVariable(key, kind?) lookup mirroring the native SDKs. Presenting stays on showScreen (served from cache). New plugin method registered in pluginMethods (iOS) / @PluginMethod (Android); iOS resolves the sandwich completion, Android uses call.toResultListener().
• New nocodes_custom_action event → optional onCustomAction(value) callback on NoCodesListener (native noCodesEvent envelope is generic, TS-only change for the event).

Verification

• yarn build (tsc + rollup, the publish gate) ✅; eslint delta on touched files kept at the level of the surrounding pre-existing debt
• verify:android / verify:ios — running, will report in a comment

🤖 Generated with Claude Code

https://claude.ai/code/session_01KQEJXqfVNxqoUcKXhSPhWn

[SpertsyanKM]

Verification notes:

• yarn build (tsc + rollup — the CI publish gate) ✅
• verify:android fails locally while configuring the :capacitor-android dependency project (Gradle cannot instrument bcprov-jdk18on-1.79.jar with the JDKs available on this machine — 11/15/18/19, no 17). The failure happens before our module is even configured and reproduces without this diff. Kotlin-side compile-compatibility of the same sandwich 7.10.1 loadScreen(ResultListener) surface is proven in the sibling PRs (flutter/RN compileDebugKotlin, cordova full sample build).
• verify:ios fails on unable to resolve module dependency: 'QonversionSandwich' — Package.swift declares no sandwich dependency while Extensions.swift (untouched here) imports it, so the SPM verify path is broken independently of this diff. iOS compiles through the example app pods instead.

Happy to fix the two verify paths in a follow-up if wanted.

[SpertsyanKM]

Review addressed: the empty-data guard rejects with ScreenLoadingFailed instead of an empty resolve, nil sandwich rejects with SDKInitializationError, CLIENT_ERROR added to the enum + mapper (the reviewer's hunch was right — it was missing here too), NoCodeEvent.payload union extended. Build green.