* Add `make_prompt_and_answer_table` function to put prompts and answers in an HTML table. The wiki provides example flashcards with and without using this table.
* Example 1
- Split contents of `de_en_add` into `de1_hint`, `de_notes`, and `de3_prompt`. The intent is that `de3` and `de3_prompt` should have the same number of tokens so that it's clear which prompt is associated with which answer.
- Add example code using the new `make_prompt_and_answer_table` function and outputting the new variables created by the function.