Using with Angular 17 SSR -> document is not defined on initializeAppCheck

### Version info

**Angular:**
17.0.8

**Firebase:**
10.7.1

**AngularFire:**
17.0.0

**Other (e.g. Ionic/Cordova, Node, browser, operating system):**
Node 18, Ionic 7, MacOS

### How to reproduce these conditions

**Steps to set up and reproduce**

1. New Angular 17 project
2. `ng add @angular/fire@17`
3. `ng add @angular/ssr`
4. Set up App Check as per https://github.com/angular/angularfire/blob/master/docs/app-check.md
5. `ng build`

### Debug output

```
⠇ Building...
ReferenceError: document is not defined
at makeDiv (/app/.angular/prerender-root/node_modules/@firebase/app-check/dist/esm/index.esm2017.js:1119:26)
at initializeV3 (/app/.angular/prerender-root/node_modules/@firebase/app-check/dist/esm/index.esm2017.js:1064:19)
at _ReCaptchaV3Provider.initialize (/app/.angular/prerender-root/node_modules/@firebase/app-check/dist/esm/index.esm2017.js:1255:9)
at _activate (/app/.angular/prerender-root/node_modules/@firebase/app-check/dist/esm/index.esm2017.js:1543:20)
at initializeAppCheck (/app/.angular/prerender-root/node_modules/@firebase/app-check/dist/esm/index.esm2017.js:1498:5)
at (app/.angular/prerender-root/c56c3be0-e454-4b23-bf7d-d028ecf276ec/node_modules/@angular/fire/fesm2022/angular-fire.mjs:216:44)
at (/app/.angular/prerender-root/c56c3be0-e454-4b23-bf7d-d028ecf276ec/node_modules/@angular/fire/fesm2022/angular-fire.mjs:148:57)
at _ZoneDelegate.invoke (/app/.angular/prerender-root/node_modules/zone.js/fesm2015/zone.js:368:26)
at _Zone.run (/app/.angular/prerender-root/node_modules/zone.js/fesm2015/zone.js:129:43)
at _NgZone.runOutsideAngular (/app/.angular/prerender-root/node_modules/@angular/core/fesm2022/core.mjs:1461
An unhandled exception occurred: document is not defined
```

### Expected behavior

AngularFire should check if rendering on a browser before calling App Check code and RecaptchaV3 (which relies on `document` being available)

### Actual behavior

No check is done, so when providing App Check, this above error occurs as soon as pre-rendering on the server happens and `document` is accessed but isn't available due to not running in a browser

まず docs/app-check.md を読み、@angular/fire/fesm2022/angular-fire.mjs に示されている initializeAppCheck の呼び出しを、報告された Firebase App Check のスタックトレースにある document へのアクセスと併せて追跡します。Angular SSR と prerendering が document エラーなしで完了し、ブラウザーでは App Check の初期化が引き続き行われれば完了です。

索引モデルが issue の本文から書いたものです。