Create modiator.md (#357)

* Create modiator.md

* Add image to modiator.md

* Better image

* Minor correction of modiator.md

* Fixed typo in modiator.md

* modiator.png image corrected

Author: MartinOtter

_2025-02/modiator.md

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+---
+title: Modiator - Modelica in the Browser
+author: "Hilding Elmqvist and Martin Otter"
+category: "vendor"
+---
+
+#### Modiator
+Modiator (Modelica Instant Simulator) is a simulator for a subset of Modelica with some extensions. 
+The compilations and simulations can run in the browser on desktops, laptops, tablets, mobiles, or using node.js 
+to run on IoT devices or on the cloud. Modiator is based on pure JavaScript modules with the simulator 
+based on Sundials compiled into WebAssembly. Modiator UI has a library browser, drag&drop Modelica diagram editing,
+Modelica text editor, plotting, Monte Carlo simulator and analyzer, 3D animation, etc.
+
+Modiator 0.1.0 will be released on September 8 at the [Modelica and FMI Conference, Luzern](https://modelica.org/events/modelica2025/).
+
+#### Tutorial at the Conference
+Modiator will be used during a tutorial at the conference. The participants will start to develop a Modelica 
+web app simulator with a specialized user interface for a certain model/domain. The specific user 
+Modelica model can be developed using the Modiator UI. A web app template will be provided which calls 
+the Modiator API to compile and simulate Modelica models. The participants will adapt this template
+to get a desired user interface for experimenting with their specific model. Alternatively, 
+AI tools can be used to produce a first Modelica model of the application and a
+first version of the HTML and JavaScript code of the web app.
+
+<img width="620" height="auto" alt="modiator" src="modiator.png" />