New port: converters/bmfdec: Decompile binary MOF file (BMF) from WMI buffer

Binary MOF buffer in WMI tools:

• Decompile binary MOF file (BMF) to UTF-8 plain text MOF file.
• Decompress binary MOF file (BMF)
• Parse binary MOF file (BMF)

EXAMPLES:
sysctl -b dev.acpi_wmi.0.bmof | bmf2mof

SEE ALSO:
acpi_wmi(4)

WWW: https://github.com/pali/bmfdec/

PR: 240353
Submitted by: <nork ninth-nine com> (previous version)
Reviewed by: takawata
Differential Revision: https://reviews.freebsd.org/D21545