Add regex match functions.

[san-rizz-777]

Add regex matching functions similar to Python's re module

Overview

This PR adds core regex matching functionality to the NFA matcher, providing a Python re-like interface for pattern matching operations.

Changes

match(const std::string_view &text)

• Performs prefix matching from the beginning of the string.
• Returns MatchResult with match status, positions, and capture groups.
• Equivalent to Python's re.match() - only matches at string start.
• Uses greedy matching strategy for longest possible match.

find_all(const std::string_view &text)

• Searches for all non-overlapping matches throughout the entire string.
• Returns vector of MatchResult objects for each match found.
• Equivalent to Python's re.findall() - scans left to right.
• Handles zero-length matches by advancing position to prevent infinite loops.

escape(const std::string_view &text)

• Escapes all regex metacharacters by prefixing them with backslashes.
• Makes special characters (., *, +, ?, |, (), [], {}, ^, $, \, -) literal.
• Equivalent to Python's re.escape() - useful for matching literal strings that may contain regex syntax.
• Pre-allocates memory for efficiency.

Implementation Details

• Built on NFA state machine with epsilon transition handling.
• Supports capture groups via SAVE states.
• Handles anchors (^, $), character classes, and dot wildcards.
• Internal match_internal() function supports both anchored and unanchored matching.

#14

[Ovetsarilish]

I have merged @AbhishekRai456 's PR, please modify the include paths and files accordingly. I will check the logic of Match-er in the meantime