[Feature]: Publish OpenAPI specs

[GuiBibeau]

Summary

To facilitate discovery and documentation we should export OpenAPI specs from js docs or similar

Problem to solve

Better discoverability

Proposed solution

Ci step that publishes the OpenAPI specs

Alternatives considered

No response

Additional context

No response

[N-45div]

Hi @GuiBibeau, I've opened PR #89 to address this issue.

Since @solana/client is a TypeScript SDK (not a REST API), I used TypeDoc instead of OpenAPI to generate API documentation from TypeScript types and JSDoc comments.

The implementation includes:

• TypeDoc configuration for the client package
• docs and docs:json scripts for generating documentation
• CI workflow to auto-publish docs to GitHub Pages on merge
• JSON API spec output for tooling/discovery integration

Let me know if you'd prefer a different approach or have any feedback!