Documentation lacks clear info which feature flags are activated by default

Describe the bug

In #1606 I learned I needed to use a more recent feature flag to get my desired behavior. So I went for 1.4 and had already trouble understand which other flags this would imply. I tried 1.4 only and just learned through pain that this does not include exec_autodie. I revisited the documentation and think this is not my fault.

Documentation for Rex 1.14.3 says on 1.4:

Furthermore, all features from earlier versions are activated.

The list of flags is quite long and it also contains conflicting flags like

• autodie
• no_autodie

Expected behavior

Can you extend the documentation to include a list of what 1.4 and other meta flags actually mean?

How to reproduce it

perldoc Rex

Code example

No response

Additional context

No response

Rex version

1.14.3

Perl version

5.38

Operating system running rex

Linux

Operating system managed by rex

Linux

How rex was installed?

cpan client

Start with lib/Rex.pm and the feature-flag section surfaced by perldoc Rex; inspect how the 1.4 and other meta flags are defined and expanded. Update the documentation with the effective flags for each meta flag, including conflicting entries such as autodie and no_autodie, and verify the rendered perldoc output.