Added cni-metrics-helper docs

[0xquark]

What type of PR is this?
This PR adds README.md to cni-metrics-helper as part of the docs

Which issue does this PR fix:
#2143

What does this PR do / Why do we need it:
Ease of use and better customer experience.

If an issue # is not available please add repro steps and logs from IPAMD/CNI showing the issue:

Testing done on this change:

Automation added to e2e:

Will this PR introduce any new dependencies?:

Will this break upgrades or downgrades. Has updating a running cluster been tested?:

Does this change require updates to the CNI daemonset config files to work?:

Does this PR introduce any user-facing change?:

Added resources field to cni-metrics-helper chart

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[0xquark]

Hi @jdn5126 ! Thanks for the help. I've made a PR on this issue. Few things i want you to take a look is :

1. I've used this git clone way to install the cni-metrics-helper. We can do the same with helm repo add amazon-vpc-cni-k8s https://aws.github.io/amazon-vpc-cni-k8s/ and then using helm install. But this gave me an error of chart not existing.So the above method i used to install cni-metrics-helper is fine?
2. I've added the Resources section in the README.md , is that what you meant by it? or do i need to add a column for resources in the values.yaml file? ( I've used the default values for the resources as available on internet)
3. I've added all the parameters in the readme which were present in values.yaml file.
   Let me know if there are any more parameters to add or any way i can improve the documentation.

[jdn5126]

Thanks so much for doing this! Just a few nits and then this is good to go

[jdn5126]

Oh sorry, I missed these questions before reviewing:

1. Yeah, the method you used is fine. Eventually, this chart will be published at https://github.com/aws/eks-charts , and that will be the recommended helm repo add.
2. So we need the resources section to be present in the values.yaml file for this to work properly. I added some comments in the review, but feel free to reach out if you have any questions.
3. The documentation looks excellent, thanks again!

[jdn5126]

Merged, thanks again @0xquark !

[0xquark]

Merged, thanks again @0xquark !

Thank you so much @jdn5126 for helping out! It was greatly appreciated.
Looking forward to contributing more in future! 🚀 🚀 🚀