Topology Optimization: alphaPorosity- Updates on next improvement.

[Ananth-Narayan-IITM]

Hello Prof. @friedenhe

I am thinking of working on topology optimization, and I have some ideas about the DAFoam architecture. I wanted to know the updates for the next release regarding Topology optimization (modeling alphaPorosity), as I am thinking of implementing a few model techniques commonly found in the literature for DASimpleFoam and DATopoChtFoam. You can refer to these papers Eq. 23, Eq. 8 for details

This will allow me to plan the improvements. May I know if there is a planned release date for the next version?

Thank you
Ananth Narayan

[friedenhe]

I saw your PR and will review it. Thanks for the contribution!