Add new exception for parsing issues

Author: SamantazFox

src/invidious/exceptions.cr

@@ -0,0 +1,8 @@
+# Exception used to hold the name of the missing item
+# Should be used in all parsing functions
+class BrokenTubeException < InfoException
+  getter element : String
+
+  def initialize(@element)
+  end
+end