fix: add ESM support by replacing __dirname

Introduced treatAsEsm input to handle ESM transformation.

action.yml

@@ -20,6 +20,9 @@ inputs:
   nodeVersion:
     description: "The version of Node.js to use."
     default: "20.10.0"
+  treatAsEsm:
+    description: "If the package is set to be treated as ESM, it will replace __dirname occurrences."
+    default: false
 outputs: {}
 runs:
   using: "composite"
@@ -42,10 +45,18 @@ runs:
       run: |
         yarn add -DE @vercel/ncc
         echo "Compiling plugin..."
-        yarn ncc build --minify ${{ inputs.pluginEntry }} -m -o dist
+        yarn ncc build ${{ inputs.pluginEntry }} -m -o dist
         echo "Compiling plugin types..."
         yarn ncc build ${{ inputs.schemaPath }} -m -o plugin
 
+    - name: Replace __dirname with import.meta.dirname
+      if: ${{ inputs.treatAsEsm }}
+      shell: bash
+      run: |
+        if [ "${{ inputs.treatAsEsm }}" = "true" ]; then
+          sed -i '' 's/__dirname/import.meta.dirname/g' "${{ github.workspace }}/dist/index.js"
+        fi
+
     - name: Update manifest configuration JSON
       uses: actions/github-script@v7
       with: