Valentina 1.0.1

Maintenance release. No new features — targeted bug fixes addressing
issues reported by the community since 1.0.0.

Highlights:
- Fixed crash on multi-monitor systems
- Fixed seam allowance for symmetrical pieces and custom paths
- Fixed notch calculation on seam allowance
- Fixed arc transformations
- Fixed blank/duplicate pages when printing to PDF in Puzzle
- Fixed inch unit support in multisize tables in Tape
- Windows installer and binaries are now code-signed
- Fixed DXF code page on Windows

Fully compatible with 1.0.0 pattern files. No migration required.