add pitch-accent-categories documentation (#663)

Author: Kuuuube

docs/anki-integration.md

@@ -50,6 +50,7 @@ Flashcard fields can be configured with the following steps:
     | `{pitch-accents}`          | List of pitch accent downstep notations for the term.                                                                    |
     | `{pitch-accent-graphs}`    | List of pitch accent graphs for the term.                                                                                |
     | `{pitch-accent-positions}` | List of accent downstep positions for the term as a number.                                                              |
+    | `{pitch-accent-categories}`| List of pitch accent categories for the term (e.g. heiban, kifuku, atamadaka, odaka, nakadaka).                          |
     | `{reading}`                | Kana reading for the term (empty for terms where the expression is the reading).                                         |
     | `{screenshot}`             | Screenshot of the web page taken at the time the term was added.                                                         |
     | `{search-query}`           | The full search query shown on the search page.                                                                          |

ext/settings.html

@@ -3330,6 +3330,10 @@ <h1>Yomitan Settings</h1>
                     <td><code class="anki-field-marker">{pitch-accent-positions}</code></td>
                     <td>List of accent downstep positions for the term as a number.</td>
                 </tr>
+                <tr>
+                    <td><code class="anki-field-marker">{pitch-accent-categories}</code></td>
+                    <td>List of pitch accent categories for the term (e.g. heiban, kifuku, atamadaka, odaka, nakadaka).</td>
+                </tr>
                 <tr>
                     <td><code class="anki-field-marker">{reading}</code></td>
                     <td>Kana reading for the term, or empty for terms where the expression is the reading.</td>