feat(blob): register on the client and doc gen

[vgonkivs]

Overview

Checklist

• New and updated code has appropriate documentation
• New and updated code has new and/or updated testing
• Required CI checks are passing
• Visual proof for any user facing features like CLI or documentation updates
• Linked issues closed with keywords

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (feature_branch_blob_module@3f4a7cf). Click here to learn what that means.
The diff coverage is n/a.

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[distractedm1nd]

Once we merge into main we need to remember to update the openrpc.json spec in this branch https://github.com/celestiaorg/celestia-node/tree/openrpc-spec so that our frontend will update. Also have to prepare some docs updates with @jcstein before we upgrade a network with it