Add LangFile Support to genieutils-py (Missing from Python Port)

[twise2]

The current version of genieutils-py is missing support for LangFile, which was present in the original C++ implementation of genieutils. This functionality is essential for parsing and interacting with the AoE-style language string files (*.txt, like language_x1.txt) used in Genie Engine games.

The C++ implementation of genieutils handles this in LangFile.cpp

Lang files are integral to localizing content for mods using the Genie Engine.

Reimplementing this functionality in Python would bring feature parity with the C++ version.

[HSZemi]

Reimplementing this functionality in Python would bring feature parity with the C++ version.

That is an exaggeration. Currently, genieutils-py only supports a small subset of game versions. And those all use key-value-strings-utf8.txt or key-value-modded-strings-utf8.txt.