Rename the overview section to focus on why EverOS matters in both English and Chinese READMEs. Simplify the EverMind ecosystem copy around EverOS as the core memory architecture and mirror that positioning in the Chinese README.
* docs: simplify README launch highlights * docs(readme): use six launch highlights * docs(readme): use optimized banner asset * ci: lint pull request titles
* docs: add EverMind ecosystem overview * docs: move ecosystem overview lower * docs: add EverOS 1.0.0 highlights * docs: streamline README flow * docs: refine README showcase layout * docs: update README banner image * docs: use uploaded README banner * docs: expand README highlights and navigation * docs: normalize README title capitalization * docs: align EverOS description with banner * docs: use high-density README banner * docs: clarify EverOS overview * docs: add README localization and star history * docs: expand Chinese README localization
