Updates to el-architecture

[SiddharthV1]

I enthusiastically merged the previous PR before reading through all of the comments. This PR is used to monitor any revisions to the recommendations that were made during the previous PR's review.

PR Checklist

Architecture File

• [x] Include the changes that @taxmeifyoucan already made when reviewing my previous PR.
• [x] Maintain a single, top-level heading.
• [x] Content Standardization
• [x] Expand the Overview
• [ ] Move code over from the specs file into architecture
• [ ] Absorb content from EPFsg presentations
• [ ] Add introductory sections on EVM, devp2p, MPT

Specs File (may do a separate PR for this since this file is long and any work on it is time consuming)

• [ ] Content standardization
• [ ] Fix LLM introduced artifacts and artificial phrasing in the specs document
• [ ] Fix Typos and grammar issue
• [ ] Maintain a single, top-level heading.

[taxmeifyoucan]

Thanks for following up on this! I will leave detailed review later as the content progresses. Reading it now, the structure and wording is great, just keep an eye on those extra spaces, capital letters, etc

[taxmeifyoucan]

Closing in favor of #224