feat: add new resources & commands from updated openapi spec

[k3llymariee]

Requirements

Adds the following resources:

ai-configs-beta
approvals-beta
experiments*
flag-import-configurations-beta
holdouts-beta
insights-charts-beta
insights-deployments-beta
insights-flag-events-beta
insights-pull-requests-beta
insights-repositories-beta
insights-scores-beta
layers
persistent-store-integrations-beta

*taken out of beta

AI Configs:

test a command:

$  go run main.go ai-configs-beta list-ai-configs
* AI Configs dogfood (For Testing) (ai-configs-dogfood)
Showing results 1 - 1 of 1.

• I have added test coverage for new or changed functionality
• I have followed the repository's pull request submission guidelines
• I have validated my changes against all supported platform versions

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