Add GET and PUT methods for these message types

[carpecodeum]

Is your feature request related to a problem? Please describe.
currently GET PUT methods are although defined but their methods are not available in senz-switch

Describe the solution you'd like
Adding methods for GET and PUT as well.

Describe alternatives you've considered
N/A

Additional context
I'm working on this though I would like to discuss this with the maintainers along the way. :)

[carpecodeum]

@YashMeh @sumedhe can you please give me your insights on this.