Values with spaces break application

Setting app name to: My Company Name will break the .env file.

https://cln.sh/BNoLe8sCHBTu7vuzrouz+

```
The environment file is invalid!
Failed to parse dotenv file due to unexpected whitespace. Failed at [My Company Name].
```

E.g. Ploi Is Awesome Company vs "Ploi Is Awesome Company"

Author: Cannonb4ll

src/EnvironmentSetCommand.php

@@ -78,7 +78,7 @@ public function handle(): void
     public function setEnvVariable(string $envFileContent, string $key, string $value): array
     {
         $oldPair = $this->readKeyValuePair($envFileContent, $key);
-        $newPair = $key . '=' . $value;
+        $newPair = $key . '="' . $value . '"';
 
         // For existed key.
         if ($oldPair !== null) {