Put InputWidget into a separate package to facilitate reuse by other apps

[dbrnz]

Using InputWidget in the CellDL editor (for bond graphs) would help ensure that its UI is similar to that of OpenCOR and provide consistency for users, with both of these applications being part of a new modelling and simulation environment.

Should the package's name reflect that, in the future, there might be other widgets that could usefully be shared between applications?

[agarny]

Thanks for this Dave. The widgets developed as part of OpenCOR could indeed packaged indidually (e.g., as @opencor/inputwidget for InputWidget) or as some kind of library (e.g., @opencor/widgets).