Epic: Blobs

[iAmMichaelConnor]

### Blobs
- [x] Implement initial version of blobs.
- [ ] Implement batched blob kzg proofs
- [ ] https://github.com/AztecProtocol/aztec-packages/issues/9101
- [x] Tightly pack tx effects inside the blob
- [ ] https://github.com/AztecProtocol/aztec-packages/issues/9982
- [ ] https://github.com/AztecProtocol/aztec-packages/issues/10147
- [ ] https://github.com/AztecProtocol/aztec-packages/issues/10323
- [ ] https://github.com/AztecProtocol/aztec-packages/issues/10754

Background on blobs: https://github.com/AztecProtocol/engineering-designs/pull/21/files

[iAmMichaelConnor]

I've copied these to the other blobs issue, so will close this one.