Add srvyr cheat sheet

[bschneidr]

Contributed Cheatsheet Information

Cheatsheet Name: srvyr
1 sentence description of the contents: A two-page cheat sheet for the 'srvyr' package.
Your Name (as you want to be credited on the website): Ben Schneider
A link to relevant package documentation (optional): http://gdfe.co/srvyr/
Date created/updated (Month YYYY format): January 2025

Please be sure you've included the Creative Commons License:

• Add CC-BY-SA Your Name to copywrite under the Creative Commons on the cheatsheet

Check that you have done the following:

• Used descriptive file names, something like package-name.pdf or task-name.pdf and did not include "cheatsheet" in the title.
• Included a PDF file of entire cheatsheet.
• Included a PNG file of the first page size 1100 x 850 in the pngs folder (for the website thumbnail).
• Included a Keynote or PowerPoint or similar file in the relevant folder (helps translators who want to translate your cheatsheet).