feat: Add charging constraint to LorraineConstraints

[dombroks]

This pull request adds support for a new requireCharging constraint to tasks, ensuring they can be configured to run only when the device is charging. The change is implemented across the codebase, including the data model, Android and iOS platform logic, database schema, and documentation. It also introduces the necessary logic to detect charging state on iOS and integrates this new constraint into the constraint-checking pipeline.

Constraint System Enhancements:

• Added requireCharging property to LorraineConstraints, updated the DSL (LorraineConstraintsDefinition) to support it, and ensured conversions between domain and entity models include this new field. [1] [2]
• Updated Android mapping to pass requireCharging to WorkManager's Constraints.

iOS Platform Support:

• Implemented ChargingCheck for iOS, including an observer for battery charging state changes, and integrated it into the iOS constraint checks. [1] [2] [3]

Database and Schema Updates:

• Added require_charging column to the ConstraintEntity and updated the Room database schema to version 4, including an auto-migration and updated schema JSON. [1] [2] [3] [4]

Documentation:

• Updated the README.md to mention the new requireCharging constraint option.