Provide custom slug URL for CRADLE studies

[mekline]

TL;DR

Create a link directly to the study list view that is pre-filtered for CRADLE studies

Narrative

As a researcher, I want to be able to send out a simple/memorable link to a view of all studies set as CRADLE

Feature Request fields

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Acceptance Criteria

A precise description of how/when this issue will be considered closed, e.g.:

• Tests for new feature
• QA on new feature
• Sign off from Kim

Implementation Notes

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[msheskin]

[Not sure the best way to comment/discuss, let me know if dropping thoughts here is not what I should do]: It would be amazing if we could do some customization of this page, rather than it being a "search results" page that looks like every other one. At a minimum, a tiny bit of "standardized branding" of the sort seen with ECCl logo on this CHS page: https://childrenhelpingscience.com/eccl-mit -- fancier would be even better (e.g., showing different things to different families based on some conditional logic, such as if the number of cradle studies they have done is zero, they see something different compared to if it is 1+

[mekline]

Closing - for phase 1, this is accomplished with an enriched CRADLE lab page (see issue #918)