chore(release): Bump version to 0.4.1 and update changelog

Updates the version in `__about__.py` and finalizes the
CHANGELOG.md for the v0.4.2 release. This version includes
robustness improvements to peak detection and a reorganization
of the examples directory.

Author: PPeitsch

CHANGELOG.md

@@ -6,6 +6,14 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 
+## [v0.4.2] - 2025-07-17
+
+### Changed
+
+-   Reorganized the `examples/` directory into categorized subdirectories (`dsc/`, `dilatometry/`, `kinetic_methods/`, etc.) to improve structure and user navigation.
+-   Renamed the generic `dsc_example.py` to `legacy_dsc_analysis_example.py` and simplified its content to serve as a basic demonstration.
+
+
 ## [v0.4.1] - 2025-07-15
 
 ### Fixed

src/pkynetics/__about__.py

@@ -1,3 +1,3 @@
 """Version information."""
 
-__version__ = "0.4.1"
+__version__ = "0.4.2"