Add script for license-check and REUSE SPDX linting

[abdelkadermeflahi6-web]

Motivation

• Provide a single, reproducible script to run the repository's SPDX and license checks so CI/devs can run license-check and reuse lint with clear failure semantics and actionable errors.

Description

• Add scripts/license_spdx_check.sh which runs license-check --fail-on "Unknown,GPLv3,AGPL" followed by reuse lint, writes reuse.log on REUSE failures, and performs preflight checks that exit with explanatory messages if license-check or reuse are missing.

Testing

• Executed ./scripts/license_spdx_check.sh, which exited early with a clear error that license-check is not installed, and an attempted python -m pip install --user reuse failed due to network/proxy restrictions so the full lint could not be run.

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Codex Task

[chatgpt-codex-connector]

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