[feature request] Move Meshery from Sandbox to Incubating

[riaankleinhans]

Meshery has moved from Sandbox to Incubating (effective 2026-09-14, TOC vote passed).

Please update devstats to reflect the new maturity level for the Meshery project.

Project: Meshery
From: Sandbox
To: Incubating
Effective date: 2026-09-14

Tracking issue: cncf/toc#2302
TOC vote PR: cncf/toc#2284
Devstats URL: https://meshery.devstats.cncf.io/

Related cross-repo PRs (for reference):

• Landscape: Move Meshery to incubating (2026-09-14) landscape#5144
• Clomonitor: Move Meshery to incubating (2026-09-14) clomonitor#1930
• Artwork: Move Meshery to incubating (2026-09-14) artwork#680
• Maintainer spreadsheet: Move Meshery to incubating (2026-09-14) foundation#1522