fix(footprints): normalize PCM footprint library references

Set module footprint namespace to SiFli_MOD and always emit qualified footprint names with PCM_ library nicknames so symbol references match packaged PCM libraries and include BGA footprints correctly.

Author: HalfSweet

src/kicad_generator/config.py

@@ -38,7 +38,7 @@ class GeneratorOptions:
     targets: GeneratorTargets
     series_filter: Tuple[str, ...] = ()
     variant_filter: Tuple[str, ...] = ()
-    footprint_namespace: str = "PCM_SiFli_MOD"
+    footprint_namespace: str = "SiFli_MOD"
     kicad_footprint_root: Path | None = None
     kicad_library_utils_root: Path | None = None
 

src/kicad_generator/footprints.py

@@ -28,7 +28,7 @@ class FootprintArtifact:
 
     @property
     def qualified_name(self) -> str:
-        return f"{self.library}:{self.name}"
+        return f"PCM_{self.library}:{self.name}"
 
 
 @dataclass(frozen=True)