Rename edge.java to Edge.java (Java naming convention)

[sauravbhattacharya001]

Problem

The �dge class in gvisual/edge.java uses a lowercase class name, which violates Java naming conventions (classes should be PascalCase).

Suggested Fix

1. Rename the class from �dge to Edgen2. Rename the file from �dge.java to Edge.javan3. Update all references across the codebase (there are ~30+ files that reference �dge as a type parameter in JUNG graphs)

Impact

• All files using Graph<String, edge> would become Graph<String, Edge>`n- Improves IDE support and consistency with Java ecosystem conventions
• No behavioral change

Notes

This is a large refactor since �dge is used as a type parameter throughout the entire codebase. Could be done incrementally or as a single rename refactor.