Subworkflow lint incorrectly converts underscores to slashes for subworkflow-to-subworkflow includes via full path

[pinin4fjords]

Description of the bug

When a subworkflow includes another subworkflow using the full path (e.g., ../../../subworkflows/nf-core/vcf_gather_bcftools), the linter incorrectly converts underscores in the component name to slashes, producing vcf/gather/bcftools instead of vcf_gather_bcftools.

This happens because get_components_to_install() in components_utils.py uses link.startswith("../../../") to identify nf-core components and then unconditionally splits on underscores and rejoins with slashes. This works for modules (where bcftools/mpileup maps to the directory structure), but subworkflow directory names use underscores (vcf_gather_bcftools), not nested directories.

Subworkflow-to-subworkflow includes via relative paths (../vcf_gather_bcftools) work correctly because they hit the elif link.startswith("../") branch which preserves the underscore name.

Minimal reproducible example

A subworkflow main.nf with:

include { VCF_GATHER_BCFTOOLS } from '../../../subworkflows/nf-core/vcf_gather_bcftools'

And meta.yml with:

components:
  - vcf_gather_bcftools

Produces lint error:

meta_include: Included module/subworkflow `vcf/gather/bcftools` missing in meta.yml

Root cause

In nf_core/components/components_utils.py line 164-170:

if link.startswith("../../../"):
    name_split = name.lower().split("_")
    component_name = "/".join(name_split)
    ...
    modules[component_name] = component_dict

This branch handles all ../../../ includes identically, but subworkflow includes via ../../../subworkflows/nf-core/... should preserve underscores and be added to subworkflows, not modules.

Context

Encountered in nf-core/modules#10283 which adds a new subworkflow that includes vcf_gather_bcftools via the full path.

Related to #4030 (closed - about module names with underscores), but this is distinct: subworkflow names inherently use underscores.

Suggested fix

Check whether the link path contains subworkflows/ before deciding how to derive the component name.