Update documentation and add advanced usage section

[MaestroError]

• Return captured groups while using group() method with get().✔️
• Remove default quantifier inside charSet.✔️
• Remove extra "[]" inside charSet.✔️
• Rename "allowChars" option to "onlyChars".✔️

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• Add advanced usage section in Docs:
  • Options and Assertions: Detailed explanation of options, how to apply them, and their effects on patterns. ✔️
  • Filters in Extraction: Using options as filters during extraction and the types of filters available. ✔️
  • Options list ✔️
  • Ensure digits / digit behavior. ✔️
  • Regex Flags: Guide on applying regex flags to patterns for specialized matching behavior. ✔️

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• Add advanced BuilderPattern methods:
  • Grouping and Capturing: How to use groups (capturing and non-capturing) and apply quantifiers to them. ✔️
  • Sets ✔️
  • Lookaheads ✔️
  • orPattern ✔️
  • Raw methods ✔️
  • Add section in docs for "lazy" method ✔️