Update features content by adding external link to math.js in linear system solvers and update import statement in frontal solver tutorial

Author: nikoscham

index.html

@@ -352,7 +352,22 @@ <h2 id="features"><a name="Features"></a>Features</h2>
             >
           </li>
           -->
-          <li>Linear system solvers (LU decomposition, Jacobi method)</li>
+          <li>
+            Linear system solvers (LU decomposition via
+            <a href="https://mathjs.org/">
+              math.js
+              <img
+                src="https://upload.wikimedia.org/wikipedia/commons/4/44/Icon_External_Link.svg"
+                alt="External Link Icon"
+                style="
+                  width: 16px;
+                  height: 16px;
+                  vertical-align: middle;
+                  margin-left: 2px;
+                  margin-bottom: 4px;
+                " /></a
+            >, Jacobi method)
+          </li>
           <li>Newton-Raphson method for nonlinear systems</li>
         </ul>
       </li>

tutorials/HeatConduction2DFinFrontal.html

@@ -18,7 +18,8 @@
     <div id="solutionPlot"></div>
     <script type="module">
       // Import FEAScript library
-      import { FEAScriptModel, plotSolution } from "../../FEAScript-core/src/index.js";
+      import { FEAScriptModel, plotSolution } from "https://core.feascript.com/dist/feascript.esm.js";
+      // import { FEAScriptModel, plotSolution } from "../../FEAScript-core/src/index.js";
 
       // Create a new FEAScript model
       const model = new FEAScriptModel();