fix: java concatenated strings in definitions and generic decorators

[kieran-ryan]

🤔 What's changed?

• Added support for generic And and But annotations in cucumber-jvm

  import io.cucumber.java.en.And;
  import io.cucumber.java.en.But;
  
  public class StepDefinitions {
      @And("^a regexp$")
          void a_regexp() {
      }
  
      @But("an {undefined-parameter}")
          void an_undefined_parameter(Date date) {
      }
  }

• Fixes an issue where concatenated strings in step definition patterns were not support with cucumber-jvm

  import io.cucumber.java.en.Given;
  
  public class StepDefinitions {
      @Given(
          "the " + "bee's "
          + "knees")
          void the_bees_knees(Date date) {
      }
  }

⚡️ What's your motivation?

• Fixes cucumber/vscode#225
• Fixes cucumber/vscode#181

🏷️ What kind of change is this?

• :bug: Bug fix (non-breaking change which fixes a defect)

♻️ Anything particular you want feedback on?

📋 Checklist:

• [x] I agree to respect and uphold the Cucumber Community Code of Conduct
• [x] I've changed the behaviour of the code
  • [x] I have added/updated tests to cover my changes.
• [x] Users should know about my change
  • [x] I have added an entry to the "Unreleased" section of the CHANGELOG, linking to this pull request.

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