fixup! [PortPather] generalize to multi-port functions where possible

masque/builder/pather_mixin.py

@@ -533,8 +533,6 @@ class PortPather:
         if len(self.ports) > 1:
             raise BuildError(f'Unable use implicit path_into() with {len(self.ports)} (>1) ports.')
         self.pather.path_into(self.ports[0], *args, **kwargs)
-        if thru is not None:
-            self.rename_from(thru)
         return self
 
     def path_from(self, *args, **kwargs) -> Self:
@@ -612,6 +610,14 @@ class PortPather:
         self.ports = [mm for mm in [name_map.get(pp, pp) for pp in self.ports] if mm is not None]
         return self
 
+    def add_ports(self, ports: Iterable[str]) -> Self:
+        ports = list(ports)
+        conflicts = set(ports) & set(self.ports)
+        if conflicts:
+            raise BuildError(f'ports {conflicts} already selected')
+        self.ports += ports
+        return self
+
     def add_port(self, port: str, index: int | None = None) -> Self:
         if port in self.ports:
             raise BuildError(f'{port=} already selected')