Introduce code from Rust monorepo. This is a mess

tts/NeMo/docs/source/tools/ctc_segmentation.rst

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+Dataset Creation Tool Based on CTC-Segmentation
+===============================================
+
+This tool provides functionality to align long audio files and the corresponding transcripts into shorter fragments
+that are suitable for an Automatic Speech Recognition (ASR) model training.
+
+More details could be found in `NeMo/tutorials/tools/CTC_Segmentation_Tutorial.ipynb <https://github.com/NVIDIA/NeMo/blob/main/tutorials/tools/CTC_Segmentation_Tutorial.ipynb>`__ (can be executed with `Google's Colab <https://colab.research.google.com/notebooks/intro.ipynb>`_).
+
+The tool is based on the `CTC-Segmentation <https://github.com/lumaku/ctc-segmentation>`__ package and
+`CTC-Segmentation of Large Corpora for German End-to-end Speech Recognition
+<https://arxiv.org/abs/2007.09127>`__ :cite:`tools-kurzinger2020ctc`
+
+
+References
+----------
+
+.. bibliography:: tools_all.bib
+    :style: plain
+    :labelprefix: TOOLS
+    :keyprefix: tools-