[email protected]: add manifest

[timbretimber]

Adds the plow http benchmarking tool

This includes links for both arm64 and x64 but arm64 builds only go back to 1.3.0 so it won't allow x64 downloads older than that.

• [x] Use conventional PR title: <manifest-name[@version]|chore>: <general summary of the pull request>
• [x] I have read the Contributing Guide

[github-actions[bot]]

All changes look good.

Wait for review from human collaborators.

plow

• [x] Description
• [x] License
• [x] Hashes
• [x] Checkver
• [x] Autoupdate
• [x] Autoupdate Hash Extraction

[timbretimber]

Issue: #6691

[timbretimber]

/verify

[github-actions[bot]]

All changes look good.

Wait for review from human collaborators.

plow

• [x] Lint
• [x] Description
• [x] License
• [x] Hashes
• [x] Checkver
• [x] Autoupdate
• [x] Autoupdate Hash Extraction

Check the full log for details.