Fix npm package README publishing

[max-voloshyn]

Summary

• Add a short package-root README for @owox/api-client so npm displays install guidance without duplicating the primary docs.
• Replace the package-external relative @owox/ctl docs link with a direct docs.owox.com URL.
• Explicitly include package READMEs in both npm files lists and add regression tests for package-safe README links/content.

Root Cause

@owox/api-client did not have a README.md in its package directory, so the published npm package had no README. @owox/ctl shipped a README, but its documentation link pointed outside the package via ../../docs/api/owox-ctl.md, which breaks when rendered on npm.

Review Follow-up

The package READMEs now use public docs.owox.com documentation links. The @owox/api-client README is intentionally minimal and links to the canonical guide, API key docs, and OpenAPI docs instead of copying guide content into the npm package README.

Validation

• npm --cache /private/tmp/owox-npm-cache run test -w @owox/ctl
• npm --cache /private/tmp/owox-npm-cache run test -w @owox/api-client
• npm --cache /private/tmp/owox-npm-cache run lint -w @owox/ctl
• npm --cache /private/tmp/owox-npm-cache run lint -w @owox/api-client
• npm --cache /private/tmp/owox-npm-cache run format:check -w @owox/ctl
• npm --cache /private/tmp/owox-npm-cache run format:check -w @owox/api-client
• npm --cache /private/tmp/owox-npm-cache run lint:md:all -- apps/ctl/README.md packages/api-client/README.md
• npm pack --dry-run --json --ignore-scripts --cache /private/tmp/owox-npm-cache -w @owox/ctl
• npm pack --dry-run --json --ignore-scripts --cache /private/tmp/owox-npm-cache -w @owox/api-client