Add security_review_app.py and SECURITY_RISK_REPORT.md for account hygiene checks

[umakarem82]

Motivation

• Introduce a small security review utility and a written risk report to aid detection of account takeover, social-engineering, and privacy leakage risks observed in WhatsApp/Aalto-style contexts.
• Provide a reusable patch-check scanner to flag suspicious/non-original code patterns such as dynamic execution and embedded secrets.

Description

• Add security_review_app.py, a CLI tool implementing two modes: interactive review questionnaire and non-interactive patch-check file scanner with a --json output option.
• Implemented review templates for chrome, whatsapp, and aalto as weighted Question sets and risk grading via the grade function.
• Added pattern-based detectors in SUSPICIOUS_PATTERNS, file discovery via files_to_scan, and a simple fingerprinting helper sha256_text to aid original-code tracking.
• Add SECURITY_RISK_REPORT.md documenting scope, key findings, risk level, immediate actions, and usage guidance including the example python3 security_review_app.py patch-check . --json command.

Testing

• No automated tests were added or executed as part of this change.

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Codex Task