add news.md file and GHA to check

.github/workflows/check-changelog.yml

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+name: Check changelog
+
+on: [ push, pull_request ]
+
+jobs:
+  check-changelog-job:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+          fetch-depth: 0
+
+      - uses: jbangdev/[email protected]
+        with:
+          script: com.github.nbbrd.heylogs:heylogs-cli:0.7.2:bin
+          scriptargs: "check NEWS.md"

NEWS.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and this project adheres
+to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+[Unreleased]: https://github.com/rjdemetra/rjd3filters/compare/v2.0.0...HEAD
+
+## [2.0.0] - 2023-12-12
+
+[2.0.0]: https://github.com/rjdemetra/rjd3filters/releases/tag/v2.0.0
+
+## First commit