fix(cli): align manifest files and publish overrides

[pallyoung]

Summary

• align the CLI package manifest to use src-oriented dev entries with publish-time dist overrides
• include dist, src, README, CHANGELOG, and package.json in the packed CLI payload
• update publish validation tests to assert publishConfig-driven bin/exports behavior

Test Plan

• pnpm exec vitest run scripts/publish-cli.test.ts scripts/build-cli.test.ts packages/cli/src/package-manifest.test.ts packages/cli/src/bin.test.ts --environment node
• pnpm exec biome check packages/cli/package.json packages/cli/CHANGELOG.md scripts/publish-cli.ts scripts/publish-cli.test.ts --diagnostic-level=error --max-diagnostics=none
• pnpm --dir packages/cli pack --dry-run --json