fix(organizations): use GET for domain availability check

[javorosas]

Summary

• fix organizations.checkDomainIsAvailable() to call GET /organizations/domain-check with query params
• remove incorrect PUT /organizations/domain-check request body usage
• add a node runtime compatibility test asserting URL, method, auth header, and response parsing

Why

The Facturapi API defines domain availability as GET /organizations/domain-check?domain=.... Using PUT can fail with 404/405 and does not match docs/spec.

Testing

• npm run test:node

[Copilot]

Pull request overview

Fixes the organizations.checkDomainIsAvailable() client method to match the Facturapi API contract by switching from an incorrect PUT with JSON body to a GET with query parameters, and adds a Node runtime compatibility test to lock in the expected request/response behavior.

Changes:

• Update Organizations.checkDomainIsAvailable() to call GET /organizations/domain-check using params (query string) instead of a PUT request body.
• Add a Node runtime compatibility test asserting URL construction, HTTP method, Authorization header, and JSON response parsing for the domain check endpoint.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
src/resources/organizations.ts	Switch domain availability check to GET with query params via the wrapper client.
test/node/runtime-compat.node.test.ts	Add runtime test validating the GET /organizations/domain-check?domain=... request and parsed { available: true } response.

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