dengjen-tts-cli-3.0.2 is not a library.
dengjen-tts-cli
Command-line interface for the dengjen-tts speech synthesis engine.
Builds the dengjen binary. dengjen speak <config|voice-key> reads text from a file or stdin, synthesizes it with a chosen model config in Lazy, Parallel, Batched, or Realtime mode, and writes the resulting audio to a file or stdout.
dengjen voices list|install|remove|refresh manages Piper voices; see the usage guide. dengjen <config> was replaced by dengjen speak <config>.