Add Sarah Drasner to 2026 foundational supporters

Closes #869

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: kjaymiller

_data/foundational_supporters.json

@@ -1,4 +1,5 @@
 {
+  "2026": ["Sarah Drasner"],
   "2025": [
     "Albert Sweigart",
     "Alla Barbalat",