Create the _generated folder before writing a .gitignore file there

[nstapelbroek]

Hi there 👋

After following the setup guide on a fresh project I got hit with a warning:

$ ./vendor/bin/codecept init api
Let's prepare Codeception for REST API testing

? Where tests will be stored? (tests) 
? Start url for tests (http://localhost/api) 
PHP Warning:  file_put_contents(tests/_support/_generated/.gitignore): failed to open stream: No such file or directory in /home/nico/Projects/myawesomeproject/vendor/codeception/codeception/src/Codeception/InitTemplate.php on line 204
> Created test directories inside at tests
> Api helper has been created in tests/_support/Helper
> ApiTester actor has been created in tests/_support
> Actions have been loaded
> Created global config codeception.yml inside the root directory
> Created a demo test ApiCest.php

 INSTALLATION COMPLETE 

Next steps:
1. Edit tests/ApiCest.php to write first API tests
2. Run tests using: codecept run

Happy testing!

To prevent this error, I came up with two solutions:

1. Create the directory before it exists
2. Patch thegitIgnore() method so it checks if the path exists before writing the file.

Approach 2 seemed more ideal but might break other logic since I don't know why the statement in https://github.com/Codeception/Codeception/blob/2.3/src/Codeception/InitTemplate.php#L203 exists. Why is it testing if we have a .gitignore in our project root? To prevent confusion I've picked solution 1.

I'd love to know if you have any feedback on the PR. Thanks for Codeception 🚀

[Naktibalda]

Thanks, this solution is good enough.