Release DSP 2025-1 1.0.1

[ssteinbuss]

There are some editorial changes required to proceed with the PAS transposition. Including those and releasing version 1.0.1:

• Circular dependency in definitions. #232
• chore: chane RFC 2119 keywords to uppercase #230
• Add Copyright statement #217

[arnoweiss]

decided to publish as 2025-1-err1