Refactor ProGuard class for improved readability and consistency

[Jonatha1983]

Added a more descriptive error message when encountering IncompleteClassHierarchyException. The enhanced message now includes:

A clear indication of the missing classes issue
Direct link to the troubleshooting documentation
Original exception as the cause for better debugging
Changes
Wrapped IncompleteClassHierarchyException with RuntimeException
Added formatted multi-line error message with troubleshooting URL
Preserved stack trace by passing original exception
Impact
Users will now receive clearer guidance when encountering class hierarchy issues, making it easier to identify and resolve missing class dependencies.

[Jonatha1983]

Hi

It is really hard to know what is the real issue with the Gradle run output:

> Task :proguard FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':proguard'.
>

  It appears you are missing some classes resulting in an incomplete class hierarchy,
  please refer to the troubleshooting page in the manual:
  https://www.guardsquare.com/en/products/proguard/manual/troubleshooting#superclass

Even with --stacktrace since the original error message was not included in the output.

[Jonatha1983]

By adding the original exception I can see the real problem:

It appears you are missing some classes resulting in an incomplete class hierarchy,  please refer to the troubleshooting page in the manual:  https://www.guardsquare.com/en/products/proguard/manual/troubleshooting#superclass > Can't find common super class of [com.anthropic.models.messages.MessageCreateParams$Builder] (with 1 known super classes: com.anthropic.models.messages.MessageCreateParams$Builder and 1 unknown classes: java.lang.Object) and [kotlin.Unit] (with 1 known super classes: kotlin.Unit and 1 unknown classes: java.lang.Object) |  

I tested this locally

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud