Espresso documentation cleanup

[philippecamacho]

Closes https://app.asana.com/1/1208976916964769/project/1209976130071762/task/1213947851318197?focus=true

This PR:

• Moves Espresso related documents from docs to espresso/docs repository
• Removes documents that are no longer relevant.

[claude]

Claude finished @philippecamacho's task in 42s —— View job

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Review: Espresso documentation cleanup

• Gather context and analyze changes
• Review changed files
• Post review feedback

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Overall this is a clean documentation reorganization PR. The moves from docs/ to espresso/docs/ and the corresponding path updates in README_ESPRESSO.md look correct.

One issue found:

• Broken link (README_ESPRESSO.md:557): The link to espresso/docs/CELO_TESTNET_MIGRATION.md will be broken — CELO_TESTNET_MIGRATION.md was deleted from docs/ but was not moved to espresso/docs/. Either remove the reference or move the file instead of deleting it. Posted as an inline comment.

Everything else (the 5 renamed/moved files, the AGENTS.md removal, and the SECURITY_ANALYSIS.md deletion) looks good.

[gemini-code-assist]

Code Review

This pull request reorganizes the project's documentation by moving several files to the espresso/docs/ directory and removing outdated documents, including the Celo Testnet Migration guide and a security analysis. Feedback identifies broken links in README_ESPRESSO.md caused by the deletion of the migration guide and the failure to move associated image assets along with their source files.

[jjeangal]

Should we also delete: pr-guidelines.md. Not sure we use it even. Actually never mind, these are upstream files.