Rename GMPv228 to GMPNext and packages accordingly #401

Job	Run time
Check type hints (3.10)	31s
Check type hints (3.13)	30s
Check type hints (3.12)	29s
Check type hints (3.9)	29s
Check type hints (3.11)	26s
Build the documentation	52s
Linting (3.10) / Linting	28s
Linting (3.11) / Linting	25s
Linting (3.12) / Linting	26s
Linting (3.9) / Linting	28s
Linting (3.13) / Linting	21s
Check versioning / Check versioning for consistency	14s
Run tests (3.12) / Run all tests	34s
Run tests (3.9) / Run all tests	35s
Run tests (3.10) / Run all tests	36s
Run tests (3.11) / Run all tests	33s
Run tests (3.13) / Run all tests	32s
Upload coverage to codecov.io	42s
	9m 11s

Provide feedback