Add changelog for 0.2.0

Author: michalharakal

CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is inspired by Keep a Changelog. Versions follow Semantic Versioning.
+
+## [0.2.0] - 2025-11-16
+
+### Added
+- Initial support for model code sharing API (model definition, execution, loading). Implements #196, related to #169.
+- Batch Normalization layer. Implements #193.
+- Forward hooks and simple tape recording for NN. Implements #190, related to #104.
+- Common traversal base for modules, with tests; Embedding implementation with dual value types; switched EEmbeddings to DualModule implementation.
+- Dropout (initial implementation) and phase support (training/eval) in execution context so modules can behave differently by phase. Related to #5.
+- `tril` op (initial version).
+- MaxPool op with DSL support; Conv2D DSL support.
+- Data API: initial version including MNIST data loader; JSON loading support (renamed loader classes from CSV to JSON) with tests. Implements #180, #181; related to #176, #179.
+- GGUF model loading implementation (initial import and working version). Implements #178, #182; related to #176, #177.
+- MatMul support in backends.
+- Nested data blocks support in DSL (data block returns a tensor); contexts for creating and collecting tensors (returning last or all created tensors).
+- JVM Ops using the Java Vector API (initial implementation) and SIMD Vector API acceleration.
+- JMH benchmarks (JVM module) and additional benchmarks.
+- Sample showing general tensor calculations (e.g., image color transformations).
+
+### Changed
+- NN DSL refactored to use `ExecutionContext`; added `ExecutionContext` parameter to `forward` functions.
+- Models and data APIs improved; unified tensor value creation in DSL; moved tensor creation context for safer vector/matrix/tensor creation.
+- Default CPU compute used for JS target.
+- JS and WASM Kotlin targets aligned for library packaging.
+- Gradle updated to 9.0.0; Android target namespaces fixed.
+
+### Fixed
+- Crash in schema validation task; added Kotlin compiler plugin configuration for expect/actual.
+- Activation not applied in Dense layer (fixed).
+- JVM target issues; fixed failing JVM tests; added regression tests; stabilized platform matching test (temporarily ignored) and additional general test fixes.
+- Miscellaneous build-signing validation added to avoid CI failures.
+
+### Performance
+- SIMD/Java Vector API acceleration for JVM backend operations.
+
+### Dependencies
+- com.vanniktech.maven.publish: 0.34.0 → 0.35.0.
+- io.ktor (android, cio, content-negotiation, core, darwin, js, logging): 3.3.1 → 3.3.2.
+- com.fasterxml.jackson.core:jackson-databind: 2.15.2 → 2.20.0 → 2.20.1.
+
+### Build & CI
+- GitHub Actions: use Java 22.
+- Bump actions/checkout from v4 to v5.
+- Add Gradle local caches to .gitignore.
+- Preparations for 0.2.0 release and ability to build local Maven version of the upcoming release.
+
+### Docs
+- Added hint/reference on normalization layer paper. Related to #192.
+
+
+## [0.1.0] - 2025-10-31
+- Initial public release of SKaiNET 0.1.0.
+