Fix data loading box

[Aarsh2101]

Describe your changes

Added geojson support in Data Loading Box.

Issue resolved by this PR (if any)

• Issue Number: 72
• Link: Improving data loading node #72

Type of change (Check all that apply)

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update
• Other:

Parts of Curio impacted by this PR:

• Frontend
• Backend
• Sandbox

Testing

• Unit Tests
• Manual Testing (please provide details below)

Screenshots (if relevant)

2025-09-11.22-42-33.mov

Checklist (Check all that apply)

• I have manually loaded each .json test from the tests/ folder into Curio, ran all the nodes one by one, and checked that they run without errors and give the expected results
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules