Added instructornote and if_solutions_else

lib/typst/local/handout/0.1.0/lib.typ

@@ -4,6 +4,13 @@
 // All functions that maybe used by client code are listed here
 #import "misc.typ": *
 #import "object.typ": problem, definition, theorem, example, remark, generic
+#import "solution.typ": (
+  if_solutions,
+  if_no_solutions,
+  if_solutions_else,
+  solution,
+  instructornote,
+)
 
 
 /// Main handout wrapper.