[CHORE] Add first part of tests for pocket basic client

[nodiesBlade]

Github issue

#16

Description

This PR:

• seperates generate proof functionality and adds a test for it.
• adds tests for ed25519 account
• adds tests for finding a random node from a request
• add tests for finding a session from a request

Deferred for followup PR: There will be a future PR to mock out the HTTP responses for makeRequest in basic_client.go which will allow us to have full coverage on the pocket client. It's been deferred because mocking out fastify for client is not trivial

Type of change

Please delete option that is not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Related PRs

List related PRs below

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other_pr	link