Added readme and test

Author: rik404

examples/ray/mandelbrot/README.rst

@@ -0,0 +1,16 @@
+==================
+Mandelbrot example
+==================
+
+mandelbrot.py <height> <width> <max_iter> <tile_size>
+    - height - height of image
+    - width - width of image
+    - max_iter - determines the "defintion" of zoom
+    - tile_size - parallelization factor. each tile is computed in parallel
+
+    Generates mandelbrot.png - Computes a high-resolution image of the Mandelbrot set using parallel processing. It divides the image into smaller rectangular tiles and distributes these tiles across multiple worker tasks using Ray-Charm4py. Each task calculates whether each pixel in its tile belongs to the Mandelbrot set, storing the result in a memory-mapped file to avoid using excessive RAM. This approach enables efficient generation of very large fractal images by balancing performance and memory usage.
+
+.. image:: mandelbrot_ray.png
+   :alt: Mandelbrot Set Visualization
+   :align: center
+    

examples/ray/mandelbrot.py renamed to examples/ray/mandelbrot/mandelbrot.py

@@ -312,5 +312,9 @@
         "condition": "numbaInstalled",
         "path": "examples/wave2d/wave2d.py",
         "args": "300 -1 --NO-RENDER"
+    },
+    {
+        "path": "examples/ray/mandelbrot.py",
+        "args": "100 100 10 10"
     }
 ]