[Issue 24087] New: Improve readability of `conflicting symbols` error message

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24087

          Issue ID: 24087
           Summary: Improve readability of `conflicting symbols` error
                    message
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: ryuukk.dev at gmail.com

Context: https://forum.dlang.org/thread/dplhrisgmgresbgzpasw@forum.dlang.org

This error message is very hard to decipher, it's too packed with long path
containing ``..``, noise everywhere

This should be cleaned to display what's the actual problem, and only that,
without the noise

I'll try to attempt a PR

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