Add README badges and cut [0.1.0] changelog section (#15)

- Add a four-badge strip to the top of the README: PyPI version,
  supported Python versions, CI status, license. First thing a
  landing visitor sees.
- Cut [Unreleased] into a dated [0.1.0] section matching what
  actually went out on PyPI today, leaving [Unreleased] empty
  aside from the new badge line.

Author: dariocazzani

CHANGELOG.md

@@ -12,6 +12,14 @@ the set of symbols exported from `devol.__all__`; anything else is internal.
 
 ### Added
 
+- README badges: PyPI version, supported Python versions, CI status, license.
+
+## [0.1.0] - 2026-05-03
+
+First published release to PyPI.
+
+### Added
+
 - Project metadata for PyPI publication (license, authors, classifiers, URLs).
 - `LICENSE` file (MIT).
 - `py.typed` marker so downstream type checkers pick up `devol`'s inline hints.
@@ -36,7 +44,3 @@ the set of symbols exported from `devol.__all__`; anything else is internal.
 ### Fixed
 
 - `DiffusionEvolution.run()` no longer requires `initial_population`; calling `algo.run()` now initializes a population automatically, matching the documented Quick Start usage and unblocking the `devol` CLI entry point.
-
-## [0.1.0]
-
-Initial development version. Not yet released to PyPI.

README.md

@@ -1,5 +1,10 @@
 # Devol
 
+[![PyPI version](https://img.shields.io/pypi/v/devol.svg)](https://pypi.org/project/devol/)
+[![Python versions](https://img.shields.io/pypi/pyversions/devol.svg)](https://pypi.org/project/devol/)
+[![CI](https://github.com/LabStrangeLoop/devol/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/LabStrangeLoop/devol/actions/workflows/ci.yml)
+[![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](https://github.com/LabStrangeLoop/devol/blob/main/LICENSE)
+
 **Diffusion Evolution** - What if evolution worked like image generation?
 
 ## What Is This?