Add FSFE (#1527)

Author: clytaemnestra

src/content/sponsors/fsfe/fsfe.svg

@@ -0,0 +1,20 @@
+---
+name: "Free Software Foundation Europe"
+url: "https://fsfe.org/"
+location: "Europe"
+industry: "Technology & Non-Profit"
+description:
+  "The Free Software Foundation Europe (FSFE) is a charity that empowers users
+  to control technology. It promotes free software through public awareness,
+  policy advocacy, and legal support — helping individuals and organizations
+  understand how software freedom enables transparency and self-determination."
+socials:
+  linkedin:
+  twitter:
+  github:
+  discord:
+  mastodon: "https://mastodon.social/@fsfe"
+  bluesky:
+logo_padding: 10px
+tier: Partners
+---