📌 Summary

fixes#176470
This PR introduces several improvements to theEdgeInsetsGeometry utilities by adding new helper methods and thorough test coverage.

✅ Changes

• Added new methods:
  • some() → CreatesEdgeInsets with all sides set to the given value.
  • exceptTop() → CreatesEdgeInsets excluding the top side.
  • Additional utility methods for more flexibility.
• Added comprehensiveunit tests for:
  • some()
  • exceptTop()
  • Other utility methods.
• Ensuredconsistency across the API surface.

🧪 Testing

• Verified new methods produce expectedEdgeInsets values.
• All test cases pass withflutter test.

🚀 Impact

• Simplifies commonEdgeInsets creation patterns.
• Increases reliability with full test coverage.
• Prepares the package for future extensions.

🔗 Related

• Resolves #<issue_number> (if applicable).

Pre-launch Checklist

• I read theContributor Guide and followed the process outlined there for submitting PRs.
• I read theTree Hygiene wiki page, which explains my responsibilities.
• I read and followed theFlutter Style Guide, includingFeatures we expect every widget to implement.
• I signed theCLA.
• I listed at least one issue that this PR fixes in the description above.
• I updated/added relevant documentation (doc comments with///).
• I added new tests to check the change I am making, or this PR istest-exempt.
• I followed thebreaking change policy and addedData Driven Fixes where supported.
• All existing and new tests are passing.

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