Rename from Picop to Picopackage

lib/picopackage/scanner.rb

@@ -0,0 +1,11 @@
+module Picop
+  module Scanner
+    def self.scan(directory, pattern: "**/*")
+      Dir.glob(File.join(directory, pattern)).select do |file|
+        next unless File.file?(file)
+        content = File.read(file)
+        content.match?(SourceFile::METADATA_PATTERN)
+      end.map { |file| SourceFile.new(file) }
+    end
+  end
+end