Hello @shubhammittal588, thanks for reaching out. Glad that you are interested in the project to improve the package creation and template support in SwiftPM!
I just wanted to make you aware that there was a pitch and proposal in this area last year (see [Pitch] New command for package creation, and package templates) which you might find to be a good starting point, at least in terms of exploring the problem space. The approach that you propose might of course be different from the approach taken by that proposal, but it might be interesting to read. There is also an opportunity to explore whether the new SwiftPM plugin subsystem can be used to support new template types.