Use composer

.editorconfig

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+# EditorConfig is awesome: https://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+# Unix-style end of lines and a blank line at the end of the file
+[*]
+indent_style = tab
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.php]
+indent_style = space
+indent_size = 4
+
+[*.{js,json,scss,css,yml,vue}]
+indent_style = space
+indent_size = 2

.github/workflows/joomla-artefact.yml

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+name: Create Joomla installation package
+
+on:
+  release:
+    types: [ published ]
+
+jobs:
+
+  createReleasePackage:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Compare release and manifest versions
+        id: check-versions
+        run: |
+          MANIFEST_VERSION=$(awk -F'[<>]' '/<version>/ {print $3}' ./jinterventionimage.xml)
+          RELEASE_VERSION=${{ github.ref_name }}
+          if [ "$MANIFEST_VERSION" != "$RELEASE_VERSION" ]; then
+            echo "Error: The release version must match the version specified in the manifest."
+            exit 1
+          fi
+
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update -y
+          sudo apt-get install git zip unzip curl jq -y
+
+      - name: Setup PHP with PECL extension
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '7.1'
+          tools: composer
+
+      - name: Get composer cache directory
+        id: composer-cache
+        run: echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
+
+      - name: Cache dependencies
+        uses: actions/cache@v4
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
+          restore-keys: ${{ runner.os }}-composer-
+
+      - name: Install composer dependencies from source
+        run: composer install --prefer-dist --no-dev --no-progress --optimize-autoloader
+
+      - name: Run build script
+        run: |
+          export TERM=xterm
+          zip -r lib_jinterventionimage.zip src vendor jinterventionimage.xml
+
+      - name: Upload artifact
+        uses: softprops/action-gh-release@v2
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          files: lib_jinterventionimage.zip

.gitignore

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+.idea
+vendor