Angular: framework version support policy

[arnoud-dv]

Currently the Angular adapter supports Angular 16 and higher. Angular 16 itself is no longer under LTS support, Angular version 17 LTS support will end on the 15th of May 2025.

Proposed support policy

The Angular adapter's dependency range will specify at least the oldest Angular version under active or LTS support. As only the minimum version and not a maximum version of Angular is specified pre-release versions of Angular are not excluded but are not guaranteed to work.

Support for older versions not under LTS support will be dropped when supporting both the older version and more recent versions becomes impractical. Bugs that only affect Angular versions not under LTS support will in principle not be fixed.