chore: final pre-submission polish for JOSS

- Add CITATION.cff for GitHub citation support and Zenodo/JOSS integration
- Fix ossim reference URL in references.bib (was pointing to unrelated repo)
- Remove broken favicon reference from index.html (no public/ directory exists)
- Add meta description to index.html
- Fix sidebar title inconsistency: "Process Simulator" → "Process Scheduler Simulator"
- Rebuild dist.tar.gz with production assets

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/GanttChart/GanttChart.tsx

@@ -27,7 +27,7 @@ const GanttChart = () => {
     return (
       <div className="border-b border-slate-800 flex items-center justify-center text-slate-600 bg-slate-900/50 text-sm select-none"
            style={{ minHeight: 80 }}>
-        Inicie a simulação para ver o diagrama de Gantt
+        Start the simulation to see the Gantt chart
       </div>
     );
   }