refactor(chart_demo): usar AppConfig.about (issue 0043)

cpp/apps/chart_demo/main.cpp

@@ -77,5 +77,12 @@ static void render() {
 }
 
 int main() {
-    return fn::run_app({.title = "fn_registry — Chart Demo", .width = 1400, .height = 900}, render);
+    return fn::run_app({
+        .title  = "fn_registry — Chart Demo",
+        .width  = 1400,
+        .height = 900,
+        .about  = {.name        = "chart demo",
+                   .version     = "0.1.0",
+                   .description = "Demo de primitivos viz: line, scatter, bar, heatmap"}
+    }, render);
 }