docs: fix YAML frontmatter structure (metadata before content)

docs: revert HF links to mochingcode org name

docs: update SHA256 to v27.0.6-1 values

docs: fix HF links, add SHA256 checksums

Release v27.0.6-1: Windows + macOS installers

docs: update URLs after username change (lming777 -> mochingcode)

docs: embed demo video in README

Fix architecture diagram alignment

Unify with GitHub: full capability matrix, competitive landscape, Moching Difference, brand consistency

Add product screenshots + referral image from GitHub assets

Final polish: remove wrong pipeline_tag, add version badge, system requirements, fix layout

Upgrade README to top-tier quality: badges, comparison table, architecture, referral

Initial release: Moching v27.0.3 (Windows + macOS)