The first iOS build after flutter create results in fairly massive diffs in the Xcode project files, in particular to the CocoaPods integration. There are also a lot of CocoaPods-related files where I'm not clear on whether these should be under source control or not.

1. Can we update the templates to reduce the pod-related diffs on first build?
2. Does the ios/.gitignore (or other .gitignores) need to be updated?

Steps to Reproduce

On a macOS host:

1. flutter create foobar
2. cd foobar
3. git init; git add .; git commit -m 'Initial commit'
4. Bring up an iPhone simulator
5. flutter run -d iPhone
6. git diff