Add blog post about Kubernetes Network Policy visualization tool knetvis

[samuelarogbonlo]

Description

This PR adds a blog post introducing knetvis, an open-source tool for visualizing and validating Kubernetes Network Policies. The post covers:

• Common challenges with Network Policies
• Technical implementation of the visualization solution
• Real-world usage examples and community impact
• Future development plans

The tool helps make network policies more understandable through visualization, testing, and validation capabilities.

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• ✅login: samuelarogbonlo / (32c6ae3)

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[natalisucks]

/hold

Hi there @samuelarogbonlo – this blog post only focuses on your own external project akin to a vendor pitch, as opposed to the appropriate blog content we usually look for on the Kubernetes blog. As this blog currently stands, it is unable to be published unless it is rewritten to suggest several different tools for the use case you present, and take some focus away from purely your project. This could also be reworked to be a case study with a company who has used this project. I've placed a hold on this blog so that you have a chance to rewrite it – however, if you don't wish to do so, then please note we'll have to close this PR.

More information about suitable blog content can be found here: https://kubernetes.io/docs/contribute/new-content/blogs-case-studies/