pango: Mark manual impls as such

This way we get docs.

Author: A6GibKm

pango/Gir.toml

@@ -106,15 +106,15 @@ status = "generate"
         const = true
     [[object.function]]
     name = "reorder_items"
-    ignore = true
+    manual = true
     [[object.function]]
     name = "shape_full"
     # invalid length computation on Stash instead of str
-    ignore = true
+    manual = true
     [[object.function]]
     name = "shape_with_flags"
     # ivanlid length computation on a Option<str>, it should fallback to 0.
-    ignore = true
+    manual = true
 
 [[object]]
 name = "Pango.Attribute"