Tour Schema Refactor

[Waidhoferj]

Refactors the tour schema to consistently match the output of the Argo Editor

Changes

• Refactored explicit classes to structural types to allow for a dynamic schema.
• Abstracted away the need for a parser and graph classes to reduce complexity and improve performance.
• Unified the data schema between the Argo Editor and this repo.
• Position modals based on a spherical coordinate system that is invariant to changes in the texture sphere sizing.
• Added portal functionality.

Testing

• See testing info

[Waidhoferj]

While this can be reviewed now, it will only work locally. I recommend that we get deployment to work first before we merge.