Add projects:drop task

lib/tasks/clone_projects.rake

@@ -3,4 +3,19 @@ namespace :projects do
   task clone: :environment do
     CloneProjectsJob.perform_now
   end
+
+  desc "Remove all repos in content/projects except for hackclub/awesome-project"
+  task drop: :environment do
+    base_dir = Rails.root.join("content/projects")
+    Dir.glob(base_dir.join("*/*")).each do |dir|
+      next unless File.directory?(dir)
+      # Keep hackclub/awesome-project
+      if dir == base_dir.join("hackclub/awesome-project").to_s
+        next
+      end
+      FileUtils.rm_rf(dir)
+      puts "Removed #{dir}"
+    end
+    puts "Done removing all projects except hackclub/awesome-project."
+  end
 end