jetbrains-settings/lightEdit.xml

<application>
  <component name="LightEdit">
    <option name="supportedFilePatterns">
      <list>
        <option value="*.conf" />
        <option value="*.ini" />
        <option value="*.json" />
        <option value="*.log" />
        <option value="*.md" />
        <option value="*.sh" />
        <option value="*.txt" />
        <option value="*.xml" />
        <option value="*.yml" />
      </list>
    </option>
  </component>
</application>