Documentation Cleanup

[igaray]

The VM is well-documented in several aspects but the documentation is often hard to find and not cross-referenced, and in some cases outdated. To consolidate docs we should:

• Clean up, review and reorganize documents in the docs folder.
• Create a docs.rs module whose module docs include the README, and documents in the docs folder, similar to the one in native.
• Install aquamarine dependency to include mermaid diagrams in rust doc.
• Make README link to the deployed benchmark results.
• Modify the github pages deployment job to include deployment of both rustdoc and benchmark pages.