feat: Graph 8. Preferred payment methods

[leopensaa]

💡 Goal

Show the % distribution of payment methods.

🤝 Acceptance Criteria

• [x] keep pie chart display
• [x] improve texts by enlarging the font. Delete separations with “_”.
• [x] follow a standard color palette for the entire dashboard

See the Notion reference with pictures as example.

[felipesaldata]

This is a minor detail to take in count as we define the palette for the dashboard