Add Kumo to web browser extension distribution information - #1851

Summary

Adds Kumo, a Chromium-based macOS browser, to web_browsers in quirks/web-browser-extension-distribution-information.json.

The entry records:

• Bundle and code-signing identifier: app.kumo.browser
• Code-signing team identifier: PV65ZWXCWX
• Default extension path: Application Support/Kumo/Default/Extensions
• Chrome Web Store support (1)

Source verification

The values were cross-checked against Kumo's official signed macOS builds, including Kumo-0.1.1-202610210001-macos-arm64.zip and v0.2.0-202610210004. Both builds report the same bundle and signing metadata; Kumo's documented Chromium profile location supports the extension-path entry.

Validation

• JSON parses cleanly and validates against the repository's Draft 2020-12 web-browser-extension distribution schema with AJV.
• tools/autoformat-json-files.rb reports no formatting changes.
• git diff --check passes.
• The branch has been cleanly refreshed with current upstream/main.

Contributor checklist

• I agree to the project's Developer Certificate of Origin
• The top-level JSON objects are sorted alphabetically
• There are no open pull requests for the same update

Fixes #1849