Auto instrumentation in Cloudflare with Vite plugin

### Problem Statement

As of now people need to manually wrap their worker with `withSentry` or `instrumentDurableObjectWithSentry` in their source code, which needs intervention. Also the config needs to be adapted in multiple places, and users already have helper functions that reuses their config.

### Solution Brainstorm

Vite could auto wrap all functions, as during build time we have access to `wrangler.jsonc` and could therefore read out which classes are meant to be wrapped with which function of ours. That would mean that users only have to add our Cloudflare Vite plugin, add a `instrument.server.ts` or similar, which could include the following code:

```js
import { defineCloudflareOptions } from '@sentry/cloudflare';

export default defineCloudflareOptions((env) => ({
dsn: env.SENTRY_DSN,
tracesSampleRate: 1,
}));
```

Since the config is a callback, which makes it possible to use the environment variables `defineCloudflareOptions` could be the solution to use these variables. On top if users wish to have different configs per worker, they could use it differently

```js
import { defineCloudflareOptions } from '@sentry/cloudflare';

// default worker
export default defineCloudflareOptions((env) => ({
dsn: env.SENTRY_DSN,
tracesSampleRate: 1,
}));

// matched name as the binding from the default worker entrypoint, will warn if it doesn't exist
export const MY_WORKER = defineCloudflareOptions((env) => ({
dsn: env.SENTRY_DSN,
tracesSampleRate: 1,
}));
```

### Additional Context

_No response_

### Priority

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