Add SHA-3 hashing support

[partyplatter08-lab]

Summary

• add SHA-3-256 (Keccak) calculation with CryptoJS.SHA3(..., { outputLength: 256 }) for uploaded evidence files
• display SHA-3 values in the hash table and log calculation completion in the System Console
• include SHA-3 values in CSV, PDF, Word, Excel, and forensic email PDF reports

Notes

• Assumption: the requested "SHA-3 (Keccak)" support maps to CryptoJS's SHA3 implementation with 256-bit output, which produces Keccak-256 compatible values.

Validation

• perl -0ne 'while (/<script>\s*(.*?)\s*<\/script>/sg) { print $1 }' index.html > /tmp/hash-report-tool-inline.js && node --check /tmp/hash-report-tool-inline.js
• git -c core.whitespace=cr-at-eol diff --check
• Headless Chrome smoke test: uploaded an in-browser sample.txt containing abc, confirmed the SHA-3 column rendered 4e03657aea45a94fc7d47ba826c8d667c0d1e6e33a64a036ec44f58fa12d6c45, confirmed 6 table columns, confirmed System Console logging, and confirmed the Excel export function is present.

/claim #2