Fix install script verbose option parsing

[fallintoplace]

Summary

• Parse ci/install_cccl.sh options before resolving the install target.
• Require exactly one positional install directory after options are consumed.
• Accept and document -verbose alongside -v and --verbose.

Root Cause

target_dir=$(realpath "$1") ran before option parsing, so option-first usage such as ci/install_cccl.sh --verbose /tmp/cccl-install passed --verbose to realpath instead of treating it as a script option.

Validation

• bash -n ci/install_cccl.sh
• git diff --check
• Fake cmake shim probes for --verbose, -v, -verbose, missing directory, and extra directory arguments.

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• ci/install_cccl.sh

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Summary

This PR fixes the option parsing logic in ci/install_cccl.sh to correctly handle the --verbose, -v, and -verbose flags when passed before the install directory argument.

Changes

File: ci/install_cccl.sh

• Reorganized the script to parse CLI options before attempting to resolve the target directory from positional arguments
• Updated the usage documentation to include -verbose alongside -v and --verbose as valid verbose options
• Modified the option-parsing case statement to handle -verbose and to exit the parsing loop when unknown options are encountered
• Added validation to ensure exactly one positional install directory is provided after option parsing, which is then resolved via realpath and created if necessary

Root Cause

Previously, target_dir=$(realpath "$1") executed before option parsing, causing commands like ci/install_cccl.sh --verbose /tmp/cccl-install to pass --verbose to realpath instead of treating it as a script option.

Testing

• Syntax validation via bash -n
• Whitespace checks via git diff --check
• Functional testing using a fake cmake shim to verify handling of --verbose, -v, -verbose options, missing directory, and extra directory arguments

Walkthrough

ci/install_cccl.sh defers computation of target_dir until after CLI options and argument count validation. Option parsing now recognizes -verbose alongside -v/--verbose, stops on unknown options, and usage text reflects all three verbose option forms.

Changes

Argument Validation Refactor

Layer / File(s)	Summary
Refactored option parsing and argument validation ci/install_cccl.sh	Usage text updated to document -v/--verbose/-verbose. Option parsing loop expanded to recognize -verbose and stop on unknown options. Argument count validation moved to after option parsing; target_dir computation via realpath and directory creation deferred to occur only after that validation check.

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