v1.7.0

Added

• Comprehensive guide to Regular Expressions (Regex) in answers/regexp.md and translated versions, covering everything from basics to advanced PCRE features.
• Visual "Match Results" code blocks for every regex example to demonstrate pattern behavior clearly.
• Quick-reference "Regex Cheat Sheet" section with formatted tables for quantifiers, tokens, collections, flags, and groups.

Updated

• Documentation introduction files (intro.mdx) in both English and Russian to correctly reflect the current count of 27 major categories.
• Synchronized all Regex content refinements across root source files and Docusaurus documentation folders.