[SDK-3909] visionOS initial documentation

[lowip]

Pull Request/Issue Resolution

Description of Change:

Adding a documentation page describing the supported, partially supported and unsupported features for visionOS

Is this change associated with a Braze feature/product release?

• No

For reviewers

Not sure if we should add anything else, let me know if you have suggestions.

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[josh-mccrowell-braze]

Assigning @internetisaiah as the reviewer when the PR is ready to be moved out of draft.

[hokstuff]

Minor nits - LGTM!

[lowip]

Hey @internetisaiah, this is ready for your review. You can merge it as your convenience.

[internetisaiah]

Awesome! I'll start reviewing today!

[internetisaiah]

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[internetisaiah]

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