Customize GitHub Stats card dimensions (height & width)

### Is your feature request related to a problem? Please describe.

Requesting an option to adjust the height and width of GitHub Stats cards. Current rectangle dimensions do not align well with the overall layout, and resizing flexibility would improve readability and presentation.

### Describe the solution you'd like

Resizing the GitHub stats rectangle

### Describe alternatives you've considered

The option to choose different theme like "Pie-chart language card layout"

Start by tracing how the GitHub Stats card is generated and how its current rectangle dimensions and theme or layout options are exposed. Clarify the supported height and width behavior and confirm that a chosen size is reflected in the rendered card without disrupting existing layouts.

Written by the indexing model from the issue text.