Capacitor Plugin Upgrade v6 to v7

Move a plugin library to Capacitor 7. Source of truth: https://capacitorjs.com/docs/updating/plugins/7-0

When to Use

• Snapshot shows @capacitor/core 6.x and the plugin must work in Capacitor 7 apps.
• Plugin code still calls call.success(), call.error(), registerWebPlugin, Capacitor.platform, Capacitor.isNative, or uses BridgeFragment.
• Package.swift points capacitor-swift-pm at branch: "main".

Do not use:

• Upgrading an app -> capacitor-app-upgrade-v6-to-v7.
• Plugin on 5.x -> capacitor-plugin-upgrade-v5-to-v6 first; on 7.x -> capacitor-plugin-upgrade-v7-to-v8. Multi-hop -> capacitor-plugin-upgrades.
• Adding SPM from scratch -> capacitor-plugin-spm-support.

Live Project Snapshot