SimpleChatTCRV:Vision: Add file input to get hold of img file

If I cant control the look of the file type input, I may have to
hide it and use a normal button, which chains into file selection
or so

tools/server/public_simplechat/index.html

@@ -60,6 +60,7 @@
             <hr>
             <div class="sameline">
                 <textarea id="user-in" class="flex-grow" rows="2" placeholder="enter your query to the ai model here" ></textarea>
+                <input id="file-btn" type="file">file</button>
                 <button id="user-btn">submit</button>
             </div>