Process the predicted json file for the launch intent handler

[akhil-ghatiki]

Details:

1. Come up with a consumer contract for the json file.
2. Have a dummy file with values for now.
3. Process this file and enrich the speech output with those values in the launch intent.

Expectation:
When the user starts the skill with the launch intent, the backend should process the file and speak out the enriched string.

[SwathiVarkala]

Dummy file is read and alexa takes orders according to that.
Improvisation : json per user to be handled in #22