v0.6.3

• feat(installer): add update subcommand for upgrading existing projects without overwriting theme source files.
• refactor(theme): rebrand text domain from "creativeblocks" to "wordpressify" and modernize block theme metadata.
• refactor(theme): improve accessibility with prefers-reduced-motion media queries and narrower CSS transitions.
• refactor(theme): remove aggressive CSS global resets that conflict with WordPress block editor defaults.
• refactor: move check-docker script to project root.
• style: format gulpfile and fix project URL.
• style(theme): update screenshot.
• docs: add contributing guidelines.