Add National Science Foundation to supporters list (#2751)

* Add National Science Foundation to supporters list

Added NSF as a supporter with their $300,000 POSE Phase I grant as referenced in the recent blog post.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

* Add NSF logo to public directory for proper serving

* Use NSF's official hosted logo URL instead of local file

---------

Co-authored-by: Claude <noreply@anthropic.com>

Author: MaxGhenis

public/data/supported-projects.json

@@ -102,5 +102,13 @@
     "amount": "$30,000",
     "awardDate": "December 2022",
     "description": "Supporting the development of a calibrated dataset for accurate tax-benefit microsimulation."
+  },
+  {
+    "supporter": "nsf",
+    "title": "Pathways to Enable Open-Source Ecosystems (POSE) Phase I",
+    "projectUrl": "https://www.nsf.gov/awardsearch/showAward?AWD_ID=2518372",
+    "amount": "$300,000",
+    "awardDate": "August 2025",
+    "description": "Supporting the development of organizational infrastructure and community engagement to strengthen the open-source ecosystem around economic policy analysis tools."
   }
 ]

public/data/supporters.json

@@ -66,5 +66,12 @@
     "logoUrl": "https://assets.nationbuilder.com/forwardparty/profile_images/de6f48e5b46f503bcdb1c95684507c4831871db6.jpg?1728658971",
     "websiteUrl": "https://www.linkedin.com/in/dylan-hirsch-shell-4b28b42/",
     "description": "a scientist, engineer, and community advocate."
+  },
+  {
+    "id": "nsf",
+    "name": "National Science Foundation",
+    "logoUrl": "https://www.nsf.gov/themes/custom/nsf_theme/components/molecules/logo/logo-desktop.png",
+    "websiteUrl": "https://www.nsf.gov/",
+    "description": "an independent federal agency supporting science and engineering in all 50 states and U.S. territories through research and education."
   }
 ]