Add Success and Error return values in Gaia-lite API

[fedekunze]

Summary

Add the remaining success values and all the error return values in Gaia-lite API

Problem Definition

On #2066 we took out the return error values from the api.md docs since they were outdated and marked as TODO.
All the http status Codes for the errors can be found within the files in each of the modules' client/rest folder.

There are also some success msg values that need to be updated/added.

EDIT: Errors are currently blocked by #2007

Proposal

• Add the remaining success values
• All the existing error return values for each of the endpoints

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[fedekunze]

Closing as already being implemented on swagger