Prepare WebCMD 0.7.1 cloud/plugin parity

[beubax]

Description

Prepares WebCMD 0.7.1 with the hosted/cloud parity work needed by webcmd-cloud PR #34:

• Adds mutable hosted file arguments (input-output) and fixes multi-output filename mapping.
• Declares hosted file contracts for plugin commands across the official catalog and removes local filesystem/binary assumptions where needed.
• Adds hosted marketplace availability metadata for hosted, mixed, and local-only plugins.
• Exposes hosted browser init / browser verify plus hosted adapter authoring source and site-memory flows.
• Documents hosted adapter authoring/autofix behavior.
• Bumps package metadata and generated manifests to 0.7.1.

Related issue: webcmd-cloud PR #34

Type of Change

• 🐛 Bug fix
• ✨ New feature
• 🌐 New site adapter
• 📝 Documentation
• ♻️ Refactor
• 🔧 CI / build / tooling

Checklist

• I ran the checks relevant to this PR
• I updated tests or docs if needed
• I included output or screenshots when useful

Adapter Notes

• Updated generated or lean docs when command discoverability changed
• Used positional args for the command's primary subject unless a named flag is clearly better
• Normalized expected adapter failures to CliError subclasses instead of raw Error

Screenshots / Output

• npm test — 442 files passed; 5,628 tests passed, 1 skipped.
• npm run build — passed.
• git diff --check origin/main..HEAD && git diff --check — passed.
• npm pack --dry-run --json — @agentrhq/webcmd@0.7.1, 877 files, integrity sha512-yfHcKCyegWKGXM8cWrzJaZVCY9TzgAfTcckiDEhROKhtUj/iz4K0+C9DJEmpzvsf78ACHgZFbWyJ1xuRmszqDg==.

Note: npm publish is not included here; local publish attempt was blocked by npm auth (ENEEDAUTH).

[github-actions]

🟠 Maintainer review suggested — low confidence

The automated review could not reach a fully supported conclusion.

Limitations

• The automated review returned an invalid structured result.

This review is advisory and does not block merging.