feat: add FreeBSD powerpc64* platform support

[pkubaj]

Description

This PR adds support for two additional FreeBSD platforms:

• FreeBsdPpc64 - FreeBSD on powerpc64,
• FreeBsdPpc64le - FreeBSD on powerpc64le,

These platforms are now recognized and properly handled across the codebase, including:

• Platform enum variants and string representations
• Architecture detection for each platform
• Runtime platform detection on FreeBSD systems
• Language bindings (TypeScript, Python, JavaScript)

The changes ensure that FreeBSD users on powerpc64* systems can properly specify their target platform when building or installing packages.

How Has This Been Tested?

• Added unit tests for parsing "freebsd-32" and "freebsd-arm64" platform strings
• Added unit tests for architecture detection of the new platforms
• Existing platform tests continue to pass
• The platform count in Python bindings updated from 23 to 25 platforms

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added sufficient tests to cover my changes.

Mirrored after #2227.