Add gh-dash schema catalog entry

[Nick2bad4u]

Summary

• register gh-dash's upstream-owned configuration schema
• match repository-local .gh-dash.yml and .gh-dash.yaml files
• match only the documented gh-dash/config.yml directory suffix for global/XDG configuration
• avoid the generic config.yml matcher and the currently unused global config.yaml filename

External ownership

• schema: https://gh-dash.dev/schema.json
• documentation: https://www.gh-dash.dev/configuration/schema/
• configuration discovery: https://www.gh-dash.dev/configuration/

The upstream schema and all referenced /schema/*.json resources return JSON successfully. gh-dash has 12.1k GitHub stars as of July 23, 2026.

Dependency

The current published schema incorrectly declares defaults.dateFormat as an integer even though the released Go type and docs require a string. This draft must remain blocked until gh-dash publishes a human-authored upstream correction. Its strict no-AI policy prohibits submitting that fix from this AI-assisted workflow.

Validation

• npm clean-install
• npm run typecheck
• npm run eslint
• targeted Prettier formatting
• SchemaStore PR audit (expected catalog-only warning only)
• live HTTP/JSON checks for the root schema and representative relative references
• catalog preconditions passed during node ./cli.js check; the full Windows run then reaches the existing unrelated Ajv stack overflow in cargo-lints-clippy.json

[github-actions]

Thanks for the PR!

This section of the codebase is owned by @madskristensen and @hyperupcall - if they write a comment saying "LGTM" then it will be merged.