Release v1.5.2

• Merge branch 'develop' (94b8890)
• Refactor Tolerance class for improved comparison logic and added 'different' method (b4f5c6c)
• Add doctest for unit testing (5f62cc4)
• Refactor container classes for improved memory management and code clarity (7e71e8b)
• Refactor Tolerance class for improved readability and consistency (fc859cf)
• Add Tolerance class for numerical comparisons (d62818a)

Full Changelog: v1.5.1...v1.5.2