update: add ethereum-blobs. (#127)

* update: add ethereum-blobs.

* fix: set contract addresses to lower case.

* fix: merkle root; include sequencer from and to txs.

* fix: apply comments.

integrations/ethereum-blobs/.gitignore

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+# Created by https://www.toptal.com/developers/gitignore/api/node
+
+# Edit at https://www.toptal.com/developers/gitignore?templates=node
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+### Node
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integrations/ethereum-blobs/CHANGELOG.md

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+# Change Log
+
+All notable changes to this project will be documented in this file.
+See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.