feat(eigen-client-extra-features): Remove steps to run from integration docs

[gianbelinche]

What ❔

This PR removes the steps to run from the integration docs.
Those are now on the zksync docs: matter-labs/zksync-docs#271

Why ❔

Checklist

• PR title corresponds to the body of PR (we generate changelog entries from PRs).
• Tests for the changes have been added / updated.
• Documentation comments have been added / updated.
• Code has been formatted via zkstack dev fmt and zkstack dev lint.

[juanbono]

Rename this file to README.md

[juanbono]

Rephrase the added paragraph a bit. It assumes a lot from the reader.

[juanbono]

Scope
The scope of this first milestone is to spin up a local EigenDA dev environment, spin up a local zksync-era dev
environment and integrate them. Instead of sending 4844 blobs, the zksync-era sends blobs to EigenDA. On L1, mock the
verification logic, such that blocks continue building. Increase the blob size from 4844 size to 2MiB blob. Deploy the
integration to Holesky testnet and provide scripts to setup a network using EigenDA as DA provider.

This should be more clear.
Rename the title to Status and make a list with the milestones. Add a couple of sentences explaining each milestone.

[gianbelinche]

Scope
The scope of this first milestone is to spin up a local EigenDA dev environment, spin up a local zksync-era dev
environment and integrate them. Instead of sending 4844 blobs, the zksync-era sends blobs to EigenDA. On L1, mock the
verification logic, such that blocks continue building. Increase the blob size from 4844 size to 2MiB blob. Deploy the
integration to Holesky testnet and provide scripts to setup a network using EigenDA as DA provider.

This should be more clear. Rename the title to Status and make a list with the milestones. Add a couple of sentences explaining each milestone.

Done