fix(cli): execute jest javascript entrypoint directly and add config unit tests

[VG31OP]

Summary

• In tools/ruview-cli/package.json, the "test" script specified node --experimental-vm-modules node_modules/.bin/jest.
• • On platforms like Windows (or npm installs where .bin/jest is a shell wrapper script rather than a symlink), passing node_modules/.bin/jest directly to the node binary fails with SyntaxError: missing ) after argument list.
• • Aligns tools/ruview-cli/package.json with tools/ruview-mcp/package.json by invoking the actual JavaScript entry point node_modules/jest/bin/jest.js.
• • Adds unit tests in tools/ruview-cli/tests/config.test.ts covering loadConfig() defaults and environment overrides.

Verification

• npm test in tools/ruview-cli exits 0 (2 passed).
• • npm run typecheck in tools/ruview-cli exits 0.
• • npm run build in tools/ruview-cli exits 0.
• • npm test in tools/ruview-mcp exits 0 (112 passed).
• • npm test in harness/homecore exits 0 (27 passed).