Release v0.23.0

Integrate upstream changes

This release contains all upstream changes from the first half of 2025.

All changes are listed below:

• Schema (BREAKING): Add "opensuse" OS flavor
• Schema (BREAKING): Add "unavailable" image status
• Schema (BREAKING): Add query filter options for CPU architecture
• Schema (BREAKING): Change title in "get_multiple_actions_response"
• Schema (BREAKING): Remove "temporary" image type
• Schema (BREAKING): Rename "placementgroups" to "placement_groups"
• Schema (BREAKING): Rename GET /actions from "list_actions" to "get_multiple_actions"
• Schema: Add sorting parameters to GET /networks
• Schema: Delete unused components (from upstream)
• Schema: Normalize schema by sorting all JSON objects
• Schema: Sort and update x-codeSamples
• Doc: Add new error code to load balancers
• Doc: Update code samples from upstream
• Doc: Update descriptions from upstream
• Doc: Update examples from upstream
• Doc: Update response summaries from upstream
• Meta: Use new URL for spec.json from Hetzner (upstream)