Add Resend community modules (Go + Node.js)

[Copilot]

Registers two community-maintained Testcontainers modules for the Resend email API — one for Go and one for Node.js. Both wrap Microcks to serve mock responses from the official Resend OpenAPI spec.

Changes

• modules/resend/index.md — catalog entry with:
  • Go module: github.com/mdelapenya/testcontainers-go-resend
  • Node.js module: @mdelapenya/testcontainers-resend
  • Code examples and install snippets for each language
• modules/resend/logo.svg — Resend logo sourced from simple-icons, scaled to 60×60 to match catalog conventions

Go usage:

ctr, err := resend.Run(ctx, resend.DefaultImage)
baseURL, err := ctr.BaseURL(ctx) // point your Resend client here

Node.js usage:

const container = await new ResendContainer().start();
const baseUrl = container.getBaseUrl(); // point your Resend client here

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