Serena's file-to-language router already maps `.t` to the Perl LS
(`Language.PERL` in `solidlsp/ls_config.py`), but the
Perl::LanguageServer-side `fileFilter` was hardcoded to
`[".pm", ".pl"]`. As a result Perl::LanguageServer skipped `.t`
files entirely: symbol queries on a `.t` returned empty, and
references to `.pm`/`.pl` subs missed any callers defined in
`.t` files.
Add `.t` to the filter, deduplicate the two `fileFilter` literals
into a `_FILE_FILTER` class constant, and note the sync requirement
with `Language.PERL.get_source_fn_matcher()` in a comment. Cover
the behavior with a new cross-file references test plus a `helper.t`
fixture; the test fails on unpatched `main` and passes on this
branch.
Adds tests for name resolution for each language and fixes the name resolution where tests have failed.
Also:
Extends python tests to cover ty
Extends skipping conditions for several LS (but only when not in CI)
Better test output in CI
Removed a wrong python test (started failing for ty and should have failed for pyright too)
Dominik Jain