Framework for embedding localizations into Rust types

Temporarily remove automatic language detection

Since env_preferences is not on crates.io, this functionality has been cut for the 0.1.0 release and will be added back in a future version. This also greatly simplifies the dependencies and should make things much faster to build, as the icu crates are now merged back into the dependency graph instead of being special-cased git dependencies.

Created by  finchie  on August 8, 2025
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