Add UX research screener template

[nicoleslaw]

Changes proposed in this pull request

• Add research screener to provide sample language for accommodations as well as broader topics (e.g., contact info, contact preferences, voluntary questions about race and ethnicity)
• Add link to screener template to main resources page
• Fixes [Request]: Create a screener template for UX research recruiting #576

Review notes

• I am new to 11ty and this era of 18F, am not sure if I did the markdown correctly for the navigation and metadata. Please check that for me.
• Additional links to this will be included in a future pull request for Create guidance on recruiting and researching with people with disabilities #304.
• No security concerns that I am aware of.

[cantsin]

What do we need here to move forward? A review?

[bpdesigns]

Hi @cantsin this is blocked by a need to discuss the screener as part of the design team's practices.

[nicoleslaw]

Closing this PR since we decided to add this template to the internal resource library.