templates: update CacheStorage type reference

[caprolactam]

Problem

The type of caches references CacheStorage from lib.dom.d.ts, but this is incompatible with the actual implementation on the Cloudflare network.
The first one is from lib.dom.d.ts, and the other is from @cloudflare/workers-types.

This is because "DOM" is specified as the lib in tsconfig.json, which is correct in itself, but some adjustments are needed.

Solution

I think there are two approaches. [Source for the fix]

First, import and declare CacheStorage type from @cloudflare/workers-types in the file where caches is defined.

Second, separate the tsconfig.json for server.ts and the app folder. While this approach allows for more accurate types, it makes the project more complicated.

.
├── tsconfig.app.json
├── tsconfig.cloudflare.json
└── tsconfig.json

// tsconfig.app.json
{
 "include": ["app"],
}
// tsconfig.cloudflare.json
{
 "include": ["server.ts"],
 "compilerOptions": {
    "target": "esnext",
    "module": "esnext",
    "lib": ["esnext"],
    "types": ["@cloudflare/workers-types"]
  }
}
// tsconfig.json
{
 "files": [],
  "references": [
    { "path": "./tsconfig.app.json" },
    { "path": "./tsconfig.cloudflare.json" }
  ]
}

If you handle the server outside of Remix (e.g. Remix + Hono), the second approach is better. However, the first approach works well in most cases.

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