Refactor Kubernetes compatibility tables for single source

[rainest]

Where is the problem?

https://docs.konghq.com/kubernetes-ingress-controller/latest/references/version-compatibility/

What happened?

To simplify edit workflows and avoid consuming screen real estate with long-outdated versions, the current versioned Kubernetes compatibility tables only include the 5 most recent KIC versions in columns and one Kong/Kubernetes/Istio version past the end of those KIC versions' compatibility through the latest version.

For example, if the latest KIC version is 2.6, the table columns will show KIC versions 2.2 through 2.6. If the oldest Kong version compatible with KIC 2.2 is Kong 2.0 and the latest Kong version is 2.8, the table rows will show Kong 1.5 (compatible with none of the listed KIC versions) through 2.8.

Limiting the rows is a new change I'd intended to make for the KIC 2.4 release: previously we showed a number of versions past what any listed KIC version was compatible with, which seemed unnecessary. Showing only one version incompatible with any displayed version should be sufficient to demonstrate that neither it nor older versions are compatible with the listed KIC versions.

This approach is easy to manage in plaintext, but does not translate well to the single-source model using {% if_version gte: A.B.x %} directives inline with the table.

What did you expect to happen?

Converting tables into a set of YAML version objects similar to https://github.com/Kong/docs.konghq.com/blob/main/app/_data/tables/plugin_index.yml and generating tables from those objects will allow editors to add new versions easily.

Code of Conduct and Community Expectations

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• I agree to abide by the Community Expectations

[rainest]

Jekyll does have a CSV tabulation guide: https://jekyllrb.com/tutorials/csv-to-table/

We also used to have a JSON-based version for gateway. Maybe still do, but it moved: https://docs.konghq.com/gateway/2.8.x/compatibility/ uses https://github.com/Kong/docs.konghq.com/blob/main/app/_data/tables/compat.json via https://github.com/Kong/docs.konghq.com/blob/main/app/gateway/2.8.x/compatibility.md?plain=1#L25-L27