[App] Charvastamy

## Metadata

- **Slug**: (Optional: override auto-generated slug, e.g. `gitcoin-grants-stack`. Required when updating existing content)
- **Short Description**: (One-line description)
- **Tags**: (comma-separated tags)
- **Featured**: (Optional: `true` to feature on homepage)

## Banner Image

## Logo

## Description

## Related Apps (Optional)

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## Related Mechanisms (Optional)

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## Related Case Studies (Optional)

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## Related Research (Optional)

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## Related Campaigns (Optional)

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## Submission Checklist

- [x] Short description is clear and concise
- [x] Tags are provided
- [x] Description is comprehensive
- [x] Related mechanisms/apps are listed (if applicable)