Allow passing [ConversionPoint] into create_pipeline with a type remap for ConversionPoint

src/breakshaft/convertor.py

@@ -38,7 +38,7 @@ class ConvRepo:
 
     def create_pipeline(self,
                         from_types: Sequence[type],
-                        fns: Sequence[Callable],
+                        fns: Sequence[Callable | Iterable[ConversionPoint] | ConversionPoint],
                         force_commutative: bool = True,
                         allow_async: bool = True,
                         allow_sync: bool = True,
@@ -50,7 +50,15 @@ class ConvRepo:
         from_types = tuple(from_types)
 
         for fn in fns:
-            injects = extract_return_type(fn)
+            injects = None
+            if isinstance(fn, collections.abc.Iterable):
+                for f in fn:
+                    injects = f.injects
+                    break
+            elif isinstance(fn, ConversionPoint):
+                injects = fn.injects
+            else:
+                injects = extract_return_type(fn)
 
             callseq = self.get_callseq(filtered_injectors, frozenset(from_types), fn, force_commutative)