ENH: Appearance of documentation console output.

[albert-github]

In the overnight documentation build it is now hard to find which warnings doxygen emits as the warning output is mixed with the "progress messages". By setting the doxygen setting QUIET = YES the "progress messages" are not shown anymore.

PR Checklist

• No API changes were made (or the changes have been approved)
• No major design changes were made (or the changes have been approved)

[greptile-apps]

Greptile Summary

This PR sets DOXYGEN_QUIET = YES in the Doxygen CMake configuration to suppress informational progress messages during documentation builds, making Doxygen warnings easier to identify in overnight CI output.

• Adds a single set(DOXYGEN_QUIET "YES") line to DoxygenConfig.cmake, grouped with the other top-level Doxygen output settings.
• No functional change to the generated documentation; only the verbosity of the build console output is affected.

Confidence Score: 5/5

Safe to merge — the change only quiets Doxygen's informational progress output and has no effect on the generated documentation or any other build artifact.

A single-line configuration addition that toggles a well-understood Doxygen verbosity flag. There is no logic change, no new dependency, and no risk of altering the documentation output itself.

No files require special attention.

Important Files Changed

Filename	Overview
Utilities/Doxygen/DoxygenConfig.cmake	Adds DOXYGEN_QUIET=YES to suppress Doxygen progress messages, making build warnings easier to spot in CI logs.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[CMake configure step] --> B[DoxygenConfig.cmake sets DOXYGEN_QUIET=YES]
    B --> C[doxygen_add_docs invoked]
    C --> D{Doxygen runs}
    D -->|Progress messages| E[Suppressed ✓]
    D -->|Warnings / Errors| F[Printed to console ✓]
    F --> G[CI log — warnings easier to find]

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[dzenanz]

/azp run ITK.macOS.Python

[dzenanz]

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