P1: Create repo scaffold (README, CONTRIBUTING, LICENSE, CODE_OF_CONDUCT)

[thebrianlopez]

Phase 1: Repo Scaffold

Parent: #1

• Create hersolutionsllc/awesome-deathcare-data repo (public)
• Add CC0 1.0 LICENSE
• Add CODE_OF_CONDUCT.md (Contributor Covenant)
• Add CONTRIBUTING.md with submission criteria and PR template
• Add .github/PULL_REQUEST_TEMPLATE.md
• Set up awesome-lint CI workflow
• Set up lychee link-check CI workflow (weekly)
• Create social preview banner image
• Set repo description and topics