* Update fingerprint-aio/index.ts
Added two optional parameters to FingerprintAIO.isAvailable to reflect the optional parameters of isAvailable in cordova-plugin-fingerprint-aio
* Update index.ts
Added documentation to isAvailable()
* Update index.ts
Added documentation to plugin
* Added "callbackOrder : 'reverse'" to isAvailable()
Changes:
- added confirmationRequired param to show method to options
- moved plugin errors to a separate enum
- changes some plugin method return values