firestore sample needs updating

### Step 1: Describe your environment

* Operating system: Windows 10
* Browser: Chrome
* Firebase SDK version: 9.8.0? Think it's installed via this: `"@angular/fire": "^7.6.1",`

### Step 2: Describe the problem:

Following instructions, there are tons of errors

#### Steps to reproduce:

1. Install Node 22
2. Clone repository
3. Nagivate to 'firestore' directory
4. Install angular cli `npm install -g @angular/cli`
5. Install Firebase CLI: `npm -g i firebase-tools`
6. `npm install`
7. `cd functions`
8. `npm install`
9. `cd ..`
10. npm run start

#### Observed Results:

Got all kinds of errors, many relating to jasmine or jest like this:

```
../node_modules/@types/jasmine/index.d.ts:24:1 - error TS6200: Definitions of the following identifiers conflict with those in another file: beforeAll, beforeEach, afterAll, afterEach, describe, fdescribe, xdescribe, it, fit, xit, expect, DEFAULT_TIMEOUT_INTERVAL, CustomMatcherFactory, CustomEqualityTester
```

I uninstalled all the jasmine and karma packages and removed the .spec.ts files and got it to build. But then `npm start` still wouldn't work, I think it was treating the deprecation as an error and put me back to the command line:

```
$ npm start

> friendly-eats-quickstart@0.0.0 start
> npm run pre-build && firebase --project demo-friendly-eats emulators:exec --import ./app-data-seed --ui 'ng serve'

> friendly-eats-quickstart@0.0.0 pre-build
> (cd functions && npm run build)

> build
> tsc

(node:25160) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
(Use `node --trace-deprecation ...` to show where the warning was created)
```
Running the command from the command line did allow the emulators and application to start:

```
firebase --project demo-friendly-eats emulators:exec --import ./app-data-seed --ui 'ng serve'
```

#### Expected Results:

There shouldn't be errors building or running following the readme directions

#### Relevant Code:

```
npm start
```

Start in the firestore directory and reproduce the Node 22 setup using the reported npm install, functions install, and npm start steps. Trace the Jasmine type conflicts and the npm start deprecation behavior, then verify that the README directions build successfully and launch the emulators and application without errors.

Written by the indexing model from the issue text.