Add tooltip helper text on web settings page buttons

- Provide more details on what clicking configure, initialize buttons
  or changing the results count slider does
- This shows up on user hovering over those buttons

src/khoj/interface/web/config.html

@@ -199,13 +199,13 @@ <h3 class="card-title">
         </div>
     </div>
     <div class="section">
-        <div id="results-count">
+        <div id="results-count" title="Number of items to show in search and use for chat response">
             <label for="results-count-slider">Results Count: <span id="results-count-value">5</span></label>
             <input type="range" id="results-count-slider" name="results-count-slider" min="1" max="10" step="1" value="5">
         </div>
         <div id="status" style="display: none;"></div>
-        <button id="configure" type="submit">⚙️ Configure</button>
-        <button id="reinitialize" type="submit">🔄 Reinitialize</button>
+        <button id="configure" type="submit" title="Update index with the latest changes">⚙️ Configure</button>
+        <button id="reinitialize" type="submit" title="Regenerate index from scratch">🔄 Reinitialize</button>
     </div>
 </div>
 <script>