Documentation for possible provider errors (#557)

* Documentation for initializeCompute.

* Changed to JSON format. Provided description.

* Added new validation errors for alogirthm.

* Finished algo validation.

* Completed errors for initialize endpoint.

* Resolved requested changes for initializeCompute route.

* Modified initializeCompute and started startCompute.

* Re-tweaked startCompute.

* Added computeStop and computeStatus.

* Finished compute endpoints. Started auth endpoints.

* Finished auth endpoints.

* Started consume endpoints.

* Files validation possible errors.

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Co-authored-by: Calina Cenan <[email protected]>