chore: align repo scaffolding with the package standard

[TheGreatAxios]

Closes CL-9392

Summary

• CLA.md and the CLA Assistant workflow (cla.yml, signatures on a cla-signatures branch) added; CONTRIBUTING links the CLA. LICENSE already matched Interchange's text.
• package.json: dropped main/types (exports covers Node and Bun) and test:unit, removed CHANGELOG.md from files, added keywords and homepage#readme, build clears dist first, test runs bun test src --pass-with-no-tests; key order is oxfmt's sortPackageJson order.
• tsconfig.json and tsconfig.build.json use the shared templates byte for byte (the build config inherits types: ["bun"]). That drops the examples include and the @corbits/system-one path alias, so examples/ is deleted; the README keeps its snippets as plain code blocks. bunfig.toml removed: it only set [test] root.
• .gitignore replaced with the shared template (drops .corbits/, .devin/, tmp/, skills-lock.json, pnpm-lock.yaml).
• New ci.yml (the repo had no CI): Node 24, bun run check, then packs the tarball and imports evaluate and createSystemOneAdapter under Node.
• CONTRIBUTING matches the template, keeps the "How it works" notes and says how the e2e suite runs. AGENTS.md drops the Distribution section and the local .devin skill path. README drops its license badge.
• CONTRIBUTING gets a Releasing section: releases are manual, as in Interchange (npm version, push tags, gh release create --generate-notes, npm publish).
• CHANGELOG.md removed; GitHub Releases track changes.

Commits

1. chore: add the CLA
2. build: align package.json and tsconfig with the package standard
3. ci: run check and a Node pack smoke
4. docs: trim CONTRIBUTING and AGENTS.md, drop examples and README badge

Checks

bun run build, typecheck, lint, format:check, test, test:e2e (live suite skipped without TYPESAFE_API_KEY) and the Node pack-and-import smoke pass locally.