Seam part files named for how many to print; publish/ ignored

31/32/33 each hold one piece, so "-x4"/"-x16" read as if the files held 4 and
16 copies. Renamed to -print-4 / -print-16 and rebuilt the Bambu Studio
projects. The MakerWorld upload package lives in publish/ (copies, not in git).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.gitignore

@@ -8,3 +8,6 @@
 
 # Python
 __pycache__/
+
+# MakerWorld upload package (copies of files already in the repo)
+publish/