Enhancements: JNLP Signature, ScanEmail Preview Image, IOC Support, and Dependency Optimization

[phutelmyer]

Describe the change

• Added (readded?) a YARA taste for JNLP signatures
• Enhanced ScanEmail to capture a preview image of the email and output it as base64
• Introduced IOC (Indicators of Compromise) support for URLs in scanjavascript and scanpdf modules
• Removed or changed some dependencies

This pull request aims to improve the functionality of Strelka by adding support for JNLP signatures, enhancing email scanning with image preview capture, and extending IOC support for URLs in relevant modules. Additionally, it optimizes the project by modifying certain dependencies.

Describe testing procedures All scanner tests have been updated and validated.

Sample output

ScanEmail Image Preview

Checklist

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of and tested my code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings

[phutelmyer]

This will close #424, #428, #423