feat(ci): Add action implementation

.github/workflows/lint-changelog.yaml

@@ -0,0 +1,16 @@
+name: Changelog Linter
+
+on:
+  pull_request:
+
+jobs:
+  lint-changelog:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Check out the repository
+      uses: actions/checkout@v4
+
+    - name: Run changelog linter
+      uses: MalteHerrmann/changelog-lint-action@0918ef12e6dc06adce0743e1c6c13707a7c20323
+

CHANGELOG.md

@@ -2,8 +2,10 @@
 This changelog was created using the `clu` binary
 (https://github.com/MalteHerrmann/changelog-utils).
 -->
-
 # Changelog
 
 ## Unreleased
 
+### Features
+
+- (ci) [#1](https://github.com/MalteHerrmann/changelog-lint-action/pull/1) Add action implementation.

Dockerfile

@@ -0,0 +1,5 @@
+FROM ghcr.io/malteherrmann/changelog-utils:latest
+
+WORKDIR /github/workspace
+
+CMD ["lint"]

action.yml

@@ -0,0 +1,9 @@
+name: 'Changelog Linter'
+description: 'A linter for your changelog. Based on https://github.com/MalteHerrmann/changelog-utils'
+author: 'Malte Herrmann'
+outputs:
+  linter-results:
+    description: 'Changelog linter output'
+runs:
+  using: 'docker'
+  image: 'Dockerfile'