Bump version to 5.3.0

[SiskaPavel]

Summary

Bump version to 5.3.0.

Details

---

✅ Checks

• CI pipeline passes (build, tests, lint, static analysis)
• The change is clearly related to a specific issue / requirement
• The PR is rebased on the latest master
• No unrelated changes are included
  - [ ] Relevant documentation was updated (if needed)
  - [ ] Documentation (e.g. Doxygen) is updated if needed
  - [ ] New code follows clang-tidy rules

---

[Copilot]

Pull Request Overview

This PR bumps the project version from 5.2.0 to 5.3.0 by updating the minor version number in the CMake configuration.

• Updates VERSION_MINOR from 2 to 3 in CMakeLists.txt