v0.1.1 of state_forge_shared_preferences

SharedPreferences persistence adapter for StateForge stores. Changelog excerpt: ### Fixed - Updated package metadata with reachable repository, issue tracker, and documentation links for pub.dev scoring. - Updated installation examples and dependency constraints for the latest state_forgepatch release. - Raised the shared_preferenceslower bound to the first version that provides SharedPreferencesAsync. - Added a package example and library documentation for pub.dev scoring. - Updated the MIT license copyright holder to Marcus Jacob.