This library provides a flexible glob matching solution in C++ using the <regex> library. It supports:

• Case-insensitive matching
• Character classes ([a-z], [!0-9])
• Recursive globbing (**)
• Extended globbing (|, ())
• Brace expansion ({a,b}.txt)

• Case-Insensitive Matching:
  1. The (?i) flag is prepended to the regex to enable case-insensitive matching.
  2. Example: *.txt matches file.txt, FILE.TXT, and File.TxT.

• Character Classes:
  1. Supports [a-z], [A-Z], [0-9], [!0-9] (negation), and [abc] (explicit set).
  2. Example: [a-z][0-9].txt matches a1.txt but not 1.txt.

• Recursive Globbing (**):
  1. ** is converted to .* in regex, allowing it to match any number of subdirectories.
  2. Example: **/file.txt matches file.txt, dir/file.txt, and dir/subdir/file.txt.

• Extended Globbing (| and ()):
  1. Supports @(pattern1|pattern2) for OR logic.
  2. Example: file@(A|B).txt matches fileA.txt and fileB.txt.

• Brace Expansion:
  1. Supports {a,b}.txt to match a.txt or b.txt.
  2. Example: {a,b}.txt matches a.txt and b.txt but not ab.txt.