`3.0`: Remove PHP 8.1 and add PHP 8.4 & 8.5 support

[alexmerlin]

Feature Request

dot-twigrenderer cannot be upgraded to PHP 8.5 because dot-navigation 3.x does not have PHP 8.5 support.

dot-twigrenderer cannot be upgraded to dot-navigation 4.x because the latter uses SM4 only and we don't want to make dot-twigrenderer SM4 only.

Q	A
New Feature	yes
RFC	no
BC Break	no

[alexmerlin]

Implemented in #43