Composer home quiet flag

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This PR fixes a bug where the composer global config home command was not correctly detecting the Composer home directory due to the --quiet flag suppressing its standard output.

The --quiet flag has been removed from the command in scripts/install-composer.sh to allow the Composer home path to be captured, ensuring the COMPOSER_HOME variable is correctly set and the subsequent prestissimo removal logic functions as intended. The 2>/dev/null redirection remains to suppress stderr warnings.

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