feat(charts): visualize top contributors

[marcgc21]

Description

Create a chart to display the most active contributors based on the number of commits. This will help highlight key contributors to the project over time.

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📊 Chart Type

• Horizontal bar chart (preferred for readability)
• Optionally show additional data like additions, deletions, or PRs

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🧾 Data Requirements

• Source: GitHub API (/repos/:owner/:repo/contributors) or Git log
• Fields needed:
  • Contributor name or username
  • Number of commits
  • (Optional) Lines added/deleted

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✅ Tasks

• Fetch contributor data with total commits
• Sort contributors by number of commits
• Generate horizontal bar chart
• Add contributor names on Y-axis and commit counts on X-axis
• (Optional) Add interactivity or tooltip with more stats (lines changed, PRs, etc.)

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