feat(cloudflare): Use explicit Env casting (#14085)

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## DESCRIBE YOUR PR

Explicitly using `Env` should help with some type issues. Part of
getsentry/sentry-javascript#16650

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## EXTRA RESOURCES

- [Sentry Docs contributor guide](https://docs.sentry.io/contributing/)

Author: AbhiPrasad

docs/platforms/javascript/guides/cloudflare/features/durableobject.mdx

@@ -7,19 +7,19 @@ _(Available in version [9.16.0](https://github.com/getsentry/sentry-javascript/r
 
 You can use the `instrumentDurableObjectWithSentry` method to instrument [Cloudflare Durable Objects](https://developers.cloudflare.com/durable-objects/).
 
-```javascript
+```typescript
 import * as Sentry from "@sentry/cloudflare";
 
 class MyDurableObjectBase extends DurableObject<Env> {
- // impl
+  // impl
 }
 
 // Export your named class as defined in your wrangler config
 export const MyDurableObject = Sentry.instrumentDurableObjectWithSentry(
-	(env) => ({
-		dsn: "___PUBLIC_DSN___",
-		tracesSampleRate: 1.0,
-	}),
-	MyDurableObjectBase,
+  (env: Env) => ({
+    dsn: "___PUBLIC_DSN___",
+    tracesSampleRate: 1.0,
+  }),
+  MyDurableObjectBase
 );
 ```

platform-includes/getting-started-config/javascript.cloudflare.workers.mdx

@@ -6,7 +6,7 @@ import { Hono, HTTPException } from "hono";
 import * as Sentry from "@sentry/cloudflare";
 
 export default Sentry.withSentry(
-  (env) => {
+  (env: Env) => {
     const { id: versionId } = env.CF_VERSION_METADATA;
 
     return {
@@ -30,7 +30,7 @@ export default Sentry.withSentry(
       // https://docs.sentry.io/platforms/javascript/configuration/options/#traces-sample-rate
       tracesSampleRate: 1.0,
       // ___PRODUCT_OPTION_END___ performance
-    }
+    };
   },
   // your existing worker export
   app

platform-includes/logs/setup/javascript.cloudflare.mdx

@@ -1,10 +1,10 @@
 To enable logging, you need to initialize the SDK with the `_experiments.enableLogs` option set to `true`.
 
-```js
+```typescript
 import * as Sentry from "@sentry/cloudflare";
 
 export default Sentry.withSentry(
-  (env) => ({
+  (env: Env) => ({
     dsn: "___PUBLIC_DSN___",
     // Enable logs to be sent to Sentry
     _experiments: { enableLogs: true },

platform-includes/performance/configure-sample-rate/javascript.cloudflare.mdx

@@ -21,7 +21,7 @@ export const onRequest = [
 import * as Sentry from "@sentry/cloudflare";
 
 export default Sentry.withSentry(
-  env => ({
+  (env: Env) => ({
     dsn: "___PUBLIC_DSN___",
     // To set a uniform sample rate
     tracesSampleRate: 0.2