add dinosaurs, dragons, and werebeasts

add some more campaign info
add encounter generators (alpha)

src/pages/tools/encounter-alpha.md

@@ -21,6 +21,13 @@ status: hidden
 </noscript>
 
 <div class="refereeTools">
+    <details class="toolDetails" open>
+        <summary>
+            <h3>Encounter Roller</h3>
+        </summary>
+        <form id="js-encounterForm"></form>
+        <div class="encounterOutput" id="js-encounterOutput"></ul>
+    </details>
     <details class="toolDetails" open>
         <summary>
             <h3>Die Roller</h3>