Auth token support + kind cluster helper

[mjudeikis]

In this PR:

1. Rename readme.md to README.md (sorry, nitpicking)
2. Add the ability to deploy with a token file
3. Remove lets encrypt production issuer as default (does not work well with kind)
4. Add helper script to deploy end-to-end kind cluster with self-signed certificates and localhost ingress (nginx)

[mjudeikis]

happy to "downsize" this PR if people think this is too much :)

[hardys]

happy to "downsize" this PR if people think this is too much :)

Personally I think it's OK as one PR, but it would be nice to break it into a few commits if possible since it's not all strictly related to the kind helper script.

[mjudeikis]

@hardys is there anything else you want me to change on this?

[mjudeikis]

@hardys whats missing to merge this?

[xrstf]

Closing to re-open again, just to get Prow working. Please do not be alarmed.

[mjudeikis]

/approved /lgtm

[kcp-ci-bot]

@mjudeikis: you cannot LGTM your own PR.

In response to [this](https://github.com/kcp-dev/helm-charts/pull/27#issuecomment-1602094617): >/approved >/lgtm Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.

[kcp-ci-bot]

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