Add new features and updates to dibujar.py and pygwalker_visualizaciones.py

- Introduced a new markdown cell in dibujar.py to enhance user guidance for drawing with the mouse.
- Updated the version in pygwalker_visualizaciones.py from 0.15.1 to 0.15.2.
- Added a new markdown cell in pygwalker_visualizaciones.py for interactive EDA with PyGWalker.
- Refactored return values in pygwalker_visualizaciones.py to streamline data handling.
- Modified Graficos_plotly.grid.json to include additional layout positions.

layouts/Graficos_plotly.grid.json

@@ -15,6 +15,12 @@
       {
         "position": null
       },
+      {
+        "position": null
+      },
+      {
+        "position": null
+      },
       {
         "position": [
           0,