Add changelog section to README and create CHANGELOG.md with version …

…`0.10.0`

CHANGELOG.md

@@ -0,0 +1,27 @@
+# Changelog
+
+> [!NOTE]
+> Changelog started with version v0.10.0.
+
+## v0.10.0
+
+### Added
+
+- Implemented [relative entropy](https://komm.dev/ref/relative_entropy) (KL divergence) function.
+- Implemented [Slepian array](https://komm.dev/ref/SlepianArray).
+- Implemented [Lloyd-Max quantizer](https://komm.dev/ref/LloydMaxQuantizer).
+- Implemented [Z-Channel](https://komm.dev/ref/ZChannel).
+- Implemented [lexicodes](https://komm.dev/ref/Lexicode).
+- Added progress bar (via `tqdm`) to potential slow methods.
+
+### Breaking changes
+
+- Converted cached properties to cached methods.
+  - In `BlockCode`: `codewords`, `codeword_weight_distribution`, `minimum_distance`, `coset_leaders`, `coset_leader_weight_distribution`, `packing_radius`, and `covering_radius`.
+  - In `ReedMullerCode`: `reed_partitions`.
+- In `UniformQuantizer`:
+  - Replaced `input_peak` with `input_range`.
+  - Removed `'unquant'` choice (use `input_range=(0.0, input_peak)` and `choice="mid-tread"` instead).
+- Converted the classes `BinaryErasureChannel`, `BinarySymmetricChannel`, `DiscreteMemorylessChannel`, `AWGNChannel`, `FixedToVariableEncoder`, `FixedToVariableDecoder`, `VariableToFixedEncoder`, `VariableToFixedDecoder`, and `DiscreteMemorylessSource` from mutable to immutable.
+- Removed `RationalPolynomial` and `RationalPolynomialFraction` classes.
+- Refactored _algebra_ and _pulse_ modules. See documentation for new usage.

README.md

@@ -78,3 +78,7 @@ There are some demos available in the `demo` directory. They are written using [
 ```bash
 streamlit run demo/index.py
 ```
+
+## Changelog
+
+See the [CHANGELOG.md](CHANGELOG.md).