improve-github-issues (#79)

fixes: #55

This PR intends to give users link to jscadui repo along with link to
JSCAD issues.

Question is if we can make it clearer which issues are for the jscad.app
and which for jscad

bit of text with links on splash screen


![image](https://github.com/hrgdavor/jscadui/assets/2480762/7e0b1727-8cd1-4db3-97f5-8f2bda09335c)

apps/jscad-web/static/index.html

@@ -27,7 +27,8 @@ <h1>JSCAD</h1>
         <ul>
           <li><a href="/docs/tutorial-01_gettingStarted.html" target="_blank">Getting Started</a></li>
           <li><a href="/docs/" target="_blank">API Reference</a></li>
-          <li><a href="https://github.com/jscad/OpenJSCAD.org" target="_blank">GitHub</a></li>
+          <li><a href="https://github.com/hrgdavor/jscadui/issues" target="_blank">GitHub (this app)</a> - for issues wth app itself</li>
+          <li><a href="https://github.com/jscad/OpenJSCAD.org" target="_blank">GitHub (JSCAD)</a> - for issues with @jscad/modeling</li>
         </ul>
 
         <label for="welcome-dismiss" class="welcome-dismiss">
@@ -87,7 +88,8 @@ <h2>Documentation</h2>
           <ul>
             <li><a href="https://openjscad.xyz/dokuwiki/doku.php" target="_blank">User Guide</a></li>
             <li><a href="/docs/" target="_blank">API Reference</a></li>
-            <li><a href="https://github.com/jscad/OpenJSCAD.org/issues" target="_blank">GitHub Issues</a></li>
+            <li><a href="https://github.com/hrgdavor/jscadui/issues" target="_blank">GitHub Issues (this app)</a></li>
+            <li><a href="https://github.com/jscad/OpenJSCAD.org/issues" target="_blank">GitHub Issues (JSCAD)</a></li>
             <li><a href="https://openjscad.nodebb.com/" target="_blank">User Group</a></li>
             <li><a href="https://discord.com/invite/AaqGskur93" target="_blank">Discord Community</a></li>
           </ul>