feature: create auto-changie to automatically generate changelog

.gitignore

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+.idea/
+*.iml

action.yml

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+name: 'Auto changie'
+description: 'Changie action with auto numbering'
+inputs:
+  changie-version:
+    description: 'Changie version'
+    default: 'latest'
+    required: false
+runs:
+  using: "composite"
+  steps:
+    - name: Setup node
+      uses: actions/setup-node@v4.0.2
+      with:
+        node-version: 20
+
+    - name: Install changie
+      run: npm i -g changie@${{ input.changie-version }}
+      shell: bash
+
+    - name: Set GitHub Path
+      run: echo "$GITHUB_ACTION_PATH" >> $GITHUB_PATH
+      shell: bash
+      env:
+        GITHUB_ACTION_PATH: ${{ github.action_path }}
+
+    - name: Update changelog with last commit
+      run: script.sh
+      shell: bash
+

script.sh

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+#!/bin/bash
+
+if [ ! -f .changie.yaml ];
+then
+  echo "changie init"
+  changie init
+  # require to format unreleased file with more accurate name than seconds to avoid overriding file during multiple `changie new` in same seconds
+  echo "fragmentFileFormat: '{{.Kind}}-{{.Time.Format \"02012006-150405.000\"}}'" >> .changie.yaml
+fi
+
+noRelease=$(cat CHANGELOG.md | grep 'No releases yet')
+
+# if never release take the first commit of all time
+if [ -z "$noRelease" ];
+then
+  lastVersion=$(changie latest)
+  lastSeenCommit=$(cat .changes/$lastVersion.md | grep --only-matching --max-count 1 -E '\b[0-9a-f]{5,40}\b')
+else
+  lastSeenCommit=$(git rev-list --max-parents=0 HEAD --abbrev-commit)
+fi
+
+commit=$(git log --oneline --pretty=format:'%h - %s' --abbrev-commit $lastSeenCommit..HEAD)
+
+# deal with case of no new commit
+if [ -n "$commit" ]; then
+
+ # add all new commit as unreleased change
+ while IFS= read -r line ; do
+   echo "$line";
+   changie new --kind Changed --body "$line"
+ done <<< "$commit"
+
+ # group unreleased change in version file
+ changie batch auto | true
+
+ # create changelog file
+ changie merge
+fi
+