Add observability chart

[nydr]

No description provided.

[mrjones-plip]

This is over my head - made one pretty irrelevant comment, but am otherwise very much deferring to @Hareet for the real review.

[mrjones-plip]

light preference to use mermaid instead of ASCII, but not that big of a deal. If you do convert it, build it in the live editor and then paste in the resulting markdown - v. fast!

[nydr]

I'm on the fence about this, mermaid if nice, but some of the consumers will be local terminal (helm show readme <chart> or locally checked out git repo) in which case I find it preferable to have plain ASCII. I vote that we keep it ASCII and reconsider mermaid if it becomes complex enough where ASCII is too limiting.

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Here's an example how mermaid would look:

flowchart LR
subgraph Daemonset
NE[Node Exporter] -->|metrics| Vector
end
NL[Node Logs] -.->|logs| Vector
Opencost <-->|metrics| Prometheus
Vector -->|metrics| Prometheus
Prometheus -->|metrics| Grafana
Vector -.->|logs| Loki
Loki-.->|logs| Grafana

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[mrjones-plip]

cools - Thanks for explaining your desire to go wit ASCII. makes sense then!