Add lucid diagram to docs

The one which explains the tokenization, classification, validation, and translation process. Can also include the architecture diagram

Review the existing documentation to find where the tokenization, classification, validation, and translation process is explained, then identify how the architecture is currently presented. Create a Lucid diagram covering the requested process and, if appropriate, the architecture, and verify that both diagrams are linked or embedded in the docs.

Written by the indexing model from the issue text.