feat: add app name, package, version info to App plugin

[imhoffd]

Feature Request

Description

Metadata about the app would be useful in the App plugin. App version code and number currently exist in the Device plugin, but make more sense in the App plugin (see #46).

Platform(s)

• iOS
• Android
• Web

Preferred Solution

interface AppInfo {
  name: string;
  package: string;
  versionCode: string;
  versionNumber: string; // or maybe number
}

// App plugin
interface App {
  ...
  getInfo(): Promise<AppInfo>;
  ...
}

Alternatives

https://github.com/whiteoctober/cordova-plugin-app-version

Additional Context

This was originally a proposal for the community: capacitor-community/proposals#65

[alexcroox]

Note the docs are out of date and show this being returned in the device plugin which was much cause for confusion:

https://capacitorjs.com/docs/apis/device

[ionitron-bot]

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