fix: add newly introduced parameter for App.start function to all corresponding usages

examples/demo.zig

@@ -133,7 +133,7 @@ pub fn main() !void {
     }, .{}));
     defer container.deinit(); // also de-initializes the children
 
-    try app.start();
+    try app.start(.full);
     defer app.stop() catch |err| log.err("Failed to stop application: {any}", .{err});
 
     // event loop
@@ -149,7 +149,7 @@ pub fn main() !void {
                 if (key.eql(.{ .cp = 'n', .mod = .{ .ctrl = true } })) {
                     try app.interrupt();
                     renderer.size = .{}; // reset size, such that next resize will cause a full re-draw!
-                    defer app.start() catch @panic("could not start app event loop");
+                    defer app.start(.full) catch @panic("could not start app event loop");
                     var child = std.process.Child.init(&.{"vim"}, allocator);
                     _ = child.spawnAndWait() catch |err| app.postEvent(.{
                         .err = .{