[DOCS] Docs improvements and possible bug

[agardnerIT]

I was going end-to-end as a new user would.

1. Start here: https://github.com/open-feature/open-feature-operator/blob/main/docs/installation.md
2. The above page should link at the bottom to: https://github.com/open-feature/open-feature-operator/blob/main/docs/getting_started.md (otherwise I've installed but can't use)
3. In my demo setup, I don't seem to need FlagSourceConfiguration so to avoid confusion, possibly move this elsewhere (or remove if it is legacy?)
4. This code snippet references openfeature.dev/flagsourceconfiguration which I believe is a typo. Using this in my setup doesn't inject the sidecar. Instead I need to use openfeature.dev/featureflagconfiguration

[james-milligan]

Hi @agardnerIT, I looked through the getting started guide and looks like there was a versioning issue with the example crd which I've fixed here. This does not resolve this issue however as it seems there is a wider docs issue.

Were you getting an error when deploying the FlagSourceConfiguration, it may be that the versioning issue fixed above was preventing the deployment of the resource, and as a result blocking pod deployment as the FlagSourceConfiguration defined in the openfeature.dev/flagsourceconfiguration could not be found, please let me know if this resolves the issue.

This code snippet references openfeature.dev/flagsourceconfiguration which I believe is a typo. Using this in my setup doesn't inject the sidecar. Instead I need to use openfeature.dev/featureflagconfiguration

Using the openfeature.dev/featureflagconfiguration annotation is deprecated. The configuration for the injected sidecar is defined using the FlagSourceConfiguration resource, which can reference a FeatureFlagConfiguration as one of its Sources, the docs for the FeatureFlagConfiguration spec can be found here.

flowchart TD
    A[Pod]-->|openfeature.dev/flagsourceconfiguration| B[FlagSourceConfiguration CR]--> |sources| C[FeatureFlagConfiguration]
    B[FlagSourceConfiguration CR]--> |sources| D[FeatureFlagConfiguration]
B[FlagSourceConfiguration CR]--> |sources| E[HTTP sync]

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[Kavindu-Dodan]

Thank you @james-milligan for the mermaid diagram. I added this to our documentation :)

@agardnerIT I think this PR fixed your concerns and documentation is now updated - #496