feat(rest): move REST server to libbitcoin_query, switch to Drogon as an optional dependency, add helper to directly serve disk contents

[kwvg]

Additional Information

• Depends on feat(test): introduce functional benchmarks (BenchFramework) and introduce mempool, ZMQ, RPC and REST benchmarks #7217

Breaking Changes

Work in progress

Checklist

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have made corresponding changes to the documentation
• I have assigned this pull request to a milestone (for repository code-owners and collaborators only)

[github-actions]

⚠️ Potential Merge Conflicts Detected

This PR has potential conflicts with the following open PRs:

• backport: Merge bitcoin/bitcoin#27357, 25977, (partial) 27594, 28583, 27608  #7200 - backport: Merge bitcoin/bitcoin#27357, 25977, (partial) 27594, 28583, 27608
• backport: bitcoin#18933, #23123, #23147, #23549, #26074, #26207, #26307, #26341, #26352, #26656, #26886, #26996, #27035 #7192 - backport: bitcoin#18933, #23123, #23147, #23549, #26074, #26207, #26307, #26341, #26352, #26656, #26886, #26996, #27035
• backport: bitcoin#23508, #24187, #24528, #24579, #25412, #27853 (deployment backports) #6888 - backport: bitcoin#23508, #24187, #24528, #24579, #25412, #27853 (deployment backports)

Please coordinate with the authors of these PRs to avoid merge conflicts.