Support NET. 8.0 - Mapster.Tool

[Cassinotte]

When trying to install the package on NET version 8.0, it says it's not compatible.

It only supports NET version 6.0 or 7.0.

Is there any plan or intention to update for compatibility with version 8.0?

[Cassinotte]

Severity Code Description Project File Line Suppression State Error NU1202 Package Mapster.Tool 8.4.0 is not compatible with net8.0 (.NETCoreApp,Version=v8.0). Package Mapster.Tool 8.4.0 supports:

• net6.0 (.NETCoreApp,Version=v6.0) / any
• net7.0 (.NETCoreApp,Version=v7.0) / any

[stagep]

Same issue as #674