Enhance Regex for Filename Parsing in Multilang

[NekoOs]

Overview

This pull request updates the regex used in the obtainLangs function of multilang.js to better handle a variety of filename conventions. The update is critical for projects that include files with complex names or paths.

Changes

• The regex pattern has been changed from /([a-z]{2}):([^.]+\.(md|html))/g to /([a-z]{2}):(.+?\.(md|html))/g.
• This enhancement allows the function to support filenames that contain spaces, multiple periods, and different directory paths.

Rationale

The previous regex failed to parse filenames with periods that were not at the position of the file extension (e.g., example.test.md) and did not support filenames with spaces or paths (e.g., ../my docs/example.md). These limitations hindered the usability of the multilang library in environments where file naming conventions vary and include more complex structures.

Benefits

• Increased flexibility in file naming conventions supported by the multilang tool.
• Improved reliability and robustness of language detection and file handling.

This update is crucial for users who manage documentation in multiple languages across various directories and naming conventions, ensuring broader usability and fewer errors in file processing.