[DOCS] Create release notes for 3.2.0 (#140)

_src/release-notes/systemds-release-notes-3.2.0.md

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+---
+layout: page
+title: SystemDS 3.2.0 Release Notes
+description: Project Release Notes
+group: nav-right
+---
+<!--
+{% comment %}
+Licensed to the Apache Software Foundation (ASF) under one or more
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+
+<section class="full-stripe full-stripe--subpage-header clear-header">
+  <div class="ml-container ml-container--horizontally-center">
+    <div class="col col-12 content-group content-group--center-content content-group--center-align">
+      <h1>{{ site.data.project.name }} 3.2.0 Release Notes</h1>
+    </div>
+  </div>
+</section>
+
+<section class="full-stripe full-stripe--alternate">
+  <div class="ml-container">
+    <div class="col col-12 content-group content-group--medium-bottom-margin" markdown="1">
+
+## Release notes for SystemDS 3.2.0
+
+SystemDS 3.2 is a minor release. Release 3.2 contains new features and major improvements to existing features.
+
+### New Features
+
+- Reuse, recycling, and memory management of GPU
+- New operator placement strategy to maximize parallelism across backends (CPU, Spark, GPU)
+- Improved compiler integration of multi-backend reuse: delayed caching, eviction placement, checkpoint placement, and asynchronous operators
+- Frame compression and lossy compression with binning
+- Improved compression support for transform encode
+- Ultra sparse matrix multiplication optimization
+- Improved parallel writing to the local file system
+- Extended sparsity propagation in federated backend
+- Deduplicated matrix block for word embedding
+- Double compressed sparse row block
+- Time-series Alignment library (Python API)
+
+
+### New Builtins
+
+- Linearized image transformations
+- Anomaly detection via IsolationForest
+- Better support for DNN models
+- Performance improvement of many existing builtins
+
+
+### Other Optimizations
+
+- Various new compiler rewrites
+- Extended constant folding
+- Improved handling of ultra-sparse matrices
+- Rewrites for GPU operators
+- Robustness for decision tree and random forest
+- Improved performance of transform encode/apply
+- Various bug fixes in memory estimates, Spark checkpointing, frame operations, IO, and other areas
+
+
+### Software Build
+
+- Upgrade spark 3.5 and corresponding dependencies and fix imports
+- Slf4j and log4j update to the latest version
+- GitHub actions improvements for Windows, upgrade the actions dependencies to the latest. Fix all the flagged dependencies
+- Fix GitHub actions failure related to federated tests
+- Code coverage and actions artifact lifecycle
+
+
+### Documentation
+
+- Fix federated tutorial commands.
+- Builtin functions, Random Forest and decision tree algorithms