[Feature Request] Anki cards: Use "displayValue" from frequency dictionaries

[stephenmk]

Example frequency dictionary:

[["明後日", "freq", {"reading": "あさって", "frequency": {"value": 5, "displayValue": "N5 (あさって)"}}],
["明後日", "freq", {"reading": "あさって", "frequency": {"value": 1, "displayValue": "N1"}}]]

Current {frequencies} output:

<ul style="text-align: left;">
    <li>JLPT: 5</li>
    <li>JLPT: 1</li>
</ul>

Expected {frequencies} output:

<ul style="text-align: left;">
    <li>JLPT: N5 (あさって)</li>
    <li>JLPT: N1</li>
</ul>

Thank you!