Add project overview page from @andrew

With apologies for not properly merging PR #5 instead

_pages/projects-sfc.md

@@ -0,0 +1,13 @@
+---
+title: Software Freedom Conservancy Projects
+excerpt: Full list of Software Freedom Conservancy projects.
+layout: default
+permalink: /projects-sfc
+nav_exclude: true
+---
+
+[Software Freedom Conservancy](foundations/sfc) provides [fiscal hosting](https://sfconservancy.org/projects/current/) for a variety of open source projects.
+
+<h2>Software Freedom Conservancy Subprojects</h2>
+
+{% include subproject.html subproject=site.data.projects-sfc %}