Removed unused System.Text.Json dependency and the `EmptyJson` field. Updated `ActionId` to be required during initialization. Changed `Header` and `Body` properties to nullable strings without default values.
Integrated MediatR for command handling by modifying the
CreateOutResCommand class to implement the IRequest interface.
Added a static EmptyJson property for default JSON serialization
and updated Header and Body properties to use it. Introduced
CreateOutResCommandHandler to handle command creation using
IRepository asynchronously.
Renamed the `ResultHeader` and `ResultBody` properties to `Header`
and `Body` in both `CreateOutResCommand` and `OutRes` classes
to improve naming consistency. Default values and database
column mappings remain unchanged.
Introduced the `CreateOutResCommand` class in the `ReC.Application.OutResults.Commands` namespace. This class includes properties for managing output results, such as `ActionId`, `ResultHeader`, `ResultBody`, and `AddedWho`. Added a static readonly `EmptyJson` property for initializing JSON fields with a serialized empty object. Included `System.Text.Json` for JSON serialization functionality.
