Add microfrontend template

[Brayden]

Description

Introduces a new Cloudflare template for supporting vertical microfrontend applications. This deploys a net-new Worker that acts as a "router" and traffic passes through it, and it routes the traffic to various other Workers through Service Bindings based on the URL path.

For example, a path defined as /app1 can route traffic to Worker A and traffic with a path of /app2 can route traffic to Worker B.

Checklist

• Template Metadata
  • template directory ends with -template
  • "cloudflare" section of package.json is populated
  • template preview image uploaded to Images
  • README is populated and uses <!-- dash-content-start --> and <!-- dash-content-end --> to designate the Dash readme preview
  • .gitignore file exists
  • package.json contains a deploy command
  • package.json contains private: true and no version field

Example package.json

"private": true,
"cloudflare": {
  "label": "Worker + D1 Database",
  "products": [
    "Workers",
    "D1"
  ],
  "categories": [
    "storage"
  ],
  "docs_url": "https://developers.cloudflare.com/d1/",
  "preview_image_url": "https://imagedelivery.net/wSMYJvS3Xw-n339CbDyDIA/cb7cb0a9-6102-4822-633c-b76b7bb25900/public"
}

[github-actions]

template	name	version	latestVersion	isDevDependency
microfrontend-template	wrangler	^4.47.0	4.54.0	true
microfrontend-template	typescript	5.8.3	5.9.3	true
microfrontend-template	@cloudflare/workers-types	^4.20251128.0	4.20251230.0	true

[github-actions]

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[github-actions]

template	name	version	latestVersion	isDevDependency
microfrontend-template	@cloudflare/vitest-pool-workers	^0.8.0	0.11.1	true
microfrontend-template	@cloudflare/workers-types	^4.20251128.0	4.20260103.0	true
microfrontend-template	typescript	5.8.3	5.9.3	true
microfrontend-template	vitest	~3.0.0	4.0.16	true
microfrontend-template	wrangler	^4.47.0	4.54.0	true

[github-actions]

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