[smbscan] add option to loot for passwords in share contents

[garatc]

Would look for specific keywords, patterns and yara rule matches in the contents of scanned shared folders

[hegusung]

Interesting projects to get info from:

• https://github.com/t3l3machus/eviltree
• https://github.com/SySS-Research/smbcrawler/blob/main/smbcrawler/secrets.py
• https://github.com/blacklanternsecurity/MANSPIDER

[hegusung]

Added