Summary

• remove incubating and podling branding from the current site config, footer, community page, homepage, README, and related top-level pages
• update current-site GitHub links from �pache/incubator-gluten to �pache/gluten, while preserving historical wording in versioned docs and blog post bodies
• delete obsolete incubator-only website assets and refresh the downloads page branding and current repository links for TLP graduation

Verification

• git diff --check origin/main...HEAD
• searched non-versioned site content outside historical posts for �pache/incubator-gluten, PPMC, and Podling Project Management Committee
• reviewed remaining incubat matches and confirmed they are limited to the intentionally retained commented footer line, historical download artifact paths, and acebookincubator/velox references