Implement The Elm Architecture for ReScript

[hyperpolymath]

This commit brings the repository into compliance with the RSR specification:

Documentation:

• Convert README.md to README.adoc (AsciiDoc format)
• Add SECURITY.md with vulnerability reporting procedures
• Add CODE_OF_CONDUCT.adoc (Contributor Covenant v2.1)
• Add CONTRIBUTING.adoc with TPCF guidelines
• Add GOVERNANCE.adoc with project governance model
• Add CHANGELOG.md following Keep a Changelog format
• Add FUNDING.yml for transparency

Licensing:

• Add dual MIT + Palimpsest v0.8 licensing
• Create LICENSE.txt with both licenses
• Create LICENSE-PALIMPSEST.txt

Infrastructure:

• Add flake.nix for Nix development environment
• Add justfile for task automation
• Add .gitattributes for consistent handling
• Add .well-known/ directory with security.txt and funding.json

Code Quality:

• Add SPDX license headers to all source files