[Documentation]: Point GitHub docs links to webcmd.dev/docs

[beubax]

Context

The repo already contains Mintlify documentation under docs/, and the public docs are intended to live at https://webcmd.dev/docs. GitHub-facing surfaces should consistently point users to that published documentation site.

Goal

Update the repository's documentation links so users coming from GitHub are directed to https://webcmd.dev/docs as the canonical docs entry point.

Proposed scope

• Update the top-level README.md to include a prominent docs link to https://webcmd.dev/docs.
• Check existing links in README.md, CONTRIBUTING.md, package metadata, and docs index pages for stale or local-only docs references.
• Ensure the Mintlify docs source in docs/ still works as the canonical source for the published site.
• If appropriate, update repository metadata/homepage settings to point at the docs site or product site.

Acceptance criteria

• GitHub users can easily find https://webcmd.dev/docs from the README.
• Stale documentation URLs are replaced or redirected to the published Mintlify docs location.
• The docs source remains in docs/ and continues to build for Mintlify.
• Contributors understand that changes to docs should be made in the repo and published to webcmd.dev/docs.