Add information about planned component versions to Caelum roadmap

[astrogeco]

Is your feature request related to a problem? Please describe.
The Caelum plan does not have information on the component version targetted for inclusion in that release

Describe the solution you'd like
Add a list of planned component versions for Caleum to the readme. For example

Caleum includes
- cFE 7.0
- osal 6.0
- PSP 1.5
- etc.

Describe alternatives you've considered
Have a separate file, Roadmap.md, that details the plans

Additional context
none

Requester Info
Gerardo E. Cruz-Ortiz, NASA-GSFC