fix: Add parentUrl to LocalData object properties

[m-hubenthal]

Summary

• Update LocalData type definition to include new field parentUrl
• Update primary documentation to reflect intended usage of LocalData
• Misc. primary documentation clean up

Context

Consumers of foundry-js need a way to respond to URL changes in the parent application. The data is already being passed from Falcon/Toucan, this updates the type definition to reflect that capability.

Test Plan

• Updated type reflects data accurately and includes inline documentation
• Other misc. documentation is updated to reflect intended usage or examples of this new property

[changeset-bot]

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Latest commit: 3d2ec63

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