ci(docs): auto-publish TypeDoc API reference to gh-pages

[bashir1738]

• Add typedoc.json with entryPoints covering public modules
• Add .github/workflows/typedoc.yml to run on every main push
• Push generated HTML output to gh-pages via peaceiris/actions-gh-pages
• Add README link to hosted docs URL

Closes #62

[Miracle656]

The TypeDoc workflow cleanup here is good (npm ci, gh-pages@v4, keep_files). Two things to trim before it lands:

1. It deletes docs/cookbook/portfolio.md and dashboard-preview.jpg, but the example they document (examples/portfolio-dashboard) is still in the repo — so this removes live docs. Please drop those deletions unless the example is also going away.
2. It removes the npm run docs:openapi step from the workflow. If the OpenAPI reference should still be published, keep that step (or explain why it's no longer needed).

Scope it to just the TypeDoc CI change and I'll merge.