Fix skipping tests with run ignored

[OmChillure]

Fixes #548

Summary

This PR adds run-ignored support through filter expressions and fixes skip-handling behavior so existing filter semantics stay correct.

You can now run:

-E "runignored(only)" to run only skipped tests
-E "runignored(all)" to run skipped + normal tests

###What Changed

• Added a new filter predicate: [runignored(mode)], with supported modes:

only
all

• Extended filter evaluation context to track whether a test has a skip decorator.
• Updated runner skip logic so skip decorators are only overridden when runignored(...) is explicitly used.
• Preserved prior behavior for regular filters like [tag(...)].

Added integration coverage for:

• runignored(only)
• runignored(all)
• No-skipped-tests behavior under runignored(only)
• Conditional skip behavior (skipif(False, ...))
• Updated filter error snapshot text to include runignored in expected predicate list.

Behavior

• Without runignored(...): skipped tests remain skipped.
• With runignored(only): only skipped tests execute.
• With runignored(all): skipped and non-skipped tests execute together.

Validation

• Ran integration tests and resolved snapshot mismatches.
• Verified targeted runs for both modes with expected outcomes.

Screenshots

Before

runignored(only)

runignored(all)

Notes

This PR introduces run-ignored behavior via filter expressions (-E ...).
A dedicated CLI flag like [--run-ignored {only|all}] is not introduced in this change.

[MatthewMckee4]

Thanks! I think I would prefer to do what nextest does here:

      --run-ignored <WHICH>
          Run ignored tests
          - default: Run non-ignored tests
          - only:    Run ignored tests
          - all:     Run both ignored and non-ignored tests

[MatthewMckee4]

Also, @OmChillure feel free to join the discord if you want to chat more about issues etc.

[OmChillure]

Thanks! I think I would prefer to do what nextest does here:

      --run-ignored <WHICH>
          Run ignored tests
          - default: Run non-ignored tests
          - only:    Run ignored tests
          - all:     Run both ignored and non-ignored tests

ahh damn, btw I have the chagnes that already does this, should I raise a new PR or is it fine If i add those commit here in this one?

[OmChillure]

Also, @OmChillure feel free to join the discord if you want to chat more about issues etc.

yeah sure

[MatthewMckee4]

@OmChillure whatever is easier for you, maybe make a new PR if you have the changes on a different branch already

[OmChillure]

@OmChillure whatever is easier for you, maybe make a new PR if you have the changes on a different branch already

Did it at #674

and closing this !!