Improve site accessibility

This adds a hidden label for the query field and the Gemini input field.

Author: Julian Merkle

templates/index.html

@@ -31,6 +31,7 @@ <h1>{{ .Cfg.AppName }}</h1>
         <div class="gem-input">
             <p>Input requested:</p>
             <form>
+                <label for="input" hidden>{{ .GemInputMeta }}</label>
                 <input id="input" name="query" placeholder="{{ .GemInputMeta }}" />
                 <br>
                 <input type="submit" value="Submit">