docs: redesign README with badges, emojis, and collapsible sections

Restyle both English and Russian READMEs to match modern open-source
project conventions — centered header, shield.io badges, emoji section
headers, feature tables, and collapsible details for client configs,
response examples, and troubleshooting.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: izzzzzi