Groovy Support version 4.0.0

Added

• Document the engine name in the help page.

Changed

• Update minimum ZAP version to 2.17.0.
• Update Groovy from 3.0.14 to 5.0.3.
  Existing Groovy scripts should work without issues,
  but if you encounter problems, please refer to the following.
  • Groovy 4 Release Notes
  • Groovy 5 Release Notes
• Update script templates:
  • authentication/AuthenticationDefaultTemplate.groovy - remove outdated example code.
  • httpsender/HttpSenderDefaultTemplate.groovy - update documentation.
  • encode-decode/EncodeDecodeDefaultTemplate.groovy - remove the final modifier from the test field.
  • httpfuzzerprocessor/FuzzerHttpProcessorDefaultTemplate.groovy - remove the final modifier from the count field.
    NOTE: The last two changes were required due to the Groovy update.