Add MiniFS extractor

[drygdryg]

MiniFS file system is commonly used in the VxWorks operating system images, for example, in TP-Link routers firmware files.
Research paper on the MiniFS structure: https://arxiv.org/html/2407.05064v1
Rust implementation of the extractor: https://github.com/RedaOps/minifs-extractor
Example file (Mercusys AC10 Wi-Fi router firmware):

ac10v1-up-noboot_2022-07-22_10.29.09.bin.zip
(MiniFS header at 0x132014)