Add GeneCards as a gene datasource

[builder-lifemap]

Adds GeneCards as a gene datasource.

I'm from the GeneCards team at the Weizmann Institute of Science. GeneCards is a human gene compendium, freely available for academic use since 1997, that aggregates 193 sources per gene. It is keyed on the HGNC-approved gene symbol, so it maps directly from the existing HGNC symbol datasource with no new identifier mapping required.

Column	Value
datasource_name	GeneCards
system_code	Gc — checked against the current file, unused (taken codes beginning with G are G, Ge, Gg, Gl, Gp, Gpl, Gpt, Gw)
website_url	https://www.genecards.org/
linkout_pattern	https://www.genecards.org/card/$id
example_identifier	BRCA1
entity_identified	gene
single_species	Homo sapiens
identifier_type	0 — secondary identifier. HGNC remains the symbol authority; GeneCards is an aggregating resource, which matches the header file's "useful as secondary linkouts" definition.
uri	urn:miriam:genecards — identifiers.org namespace genecards, MIR:00000323, not deprecated
regex	^[A-Za-z-0-9_]+(\@)?$ — the pattern registered at identifiers.org, kept identical for consistency
official_name	GeneCards
wikidata_property	(empty — see note below)
bioregistry	genecards.gene — see note below
category	gene

Ran the local integrity checks before submitting: column count matches datasources_headers.tsv (14), and BRCA1 matches the supplied regex. genecards is present in the MIRIAM registry.

Two notes on the deliberately-caveated columns:

1. wikidata_property is empty because no GeneCards property currently exists on Wikidata (verified via property search, SPARQL, and a full entity dump). We are proposing one, and I'll follow up here if it is accepted so the column can be filled.

2. bioregistry is genecards.gene, which is the canonical prefix today (genecards is registered as its synonym). That record is currently flagged deprecated: true, which we believe is inherited from a stale Integbio sub-record rather than an assessment of the resource — GeneCards is actively maintained and shipped v6 this year. We've raised that with the Bioregistry maintainers (genecards.gene is marked deprecated but is actively maintained; uri_format and homepage also outdated biopragmatics/bioregistry#2019). If test_valid_bioregistry objects to the deprecated prefix, I'm happy to leave column 13 empty until that is resolved — just say which you'd prefer.

Happy to adjust identifier_type, the regex, or the naming to suit your conventions.