Setting to limit number of workflow runs displayed in the sidebar

**Is your feature request related to a problem? Please describe.**
The current list of workflow runs in the sidebar can be very long and cluttered. I often only care about the most recent runs (e.g., the last 3) to check their status quickly.

**Describe the solution you'd like**
I would like a configuration setting (e.g., `github-actions.workflows.limit`) that allows me to define the number of latest runs shown per workflow in the sidebar. For example, setting it to `3` would only show the 3 most recent runs.

**Describe alternatives you've considered**
Currently, I have to scroll through a long list of history which is distracting.

**Additional context**
This would help keep the UI clean and focused on immediate feedback.

El issue no indica archivos, pruebas ni puntos de entrada. Empieza localizando el renderizado de la barra lateral de ejecuciones de workflows y las declaraciones de configuración de la extensión; después, sigue el flujo de cómo se obtienen y muestran las ejecuciones. Se considera terminado cuando una configuración como github-actions.workflows.limit limita cada workflow a su número configurado de ejecuciones más recientes.

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