[CLI-24] Update service versions from the registry

[akalipetis]

• feat(registry): update versions from the registry
• feat(registry): automatically generate version file from registry

Fix CLI-24

[Copilot]

Pull Request Overview

This PR updates service and runtime versions across the codebase to align with the latest versions available in the Platform.sh registry. The changes include introducing an automated version generation system that fetches current versions from the registry.

Key changes:

• Added automated version generation tool that fetches versions from Platform.sh registry
• Updated service and runtime versions to their latest supported versions (e.g., Redis 6.2→8.0, PostgreSQL 14→17, Python 3.9→3.13)
• Updated test fixtures and templates to reflect new default versions

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
internal/question/models/generate_versions.go	New generator tool that fetches and formats version data from registry
internal/question/models/version.go	Updated version mappings with latest supported versions from registry
validator/validator_test.go	Updated test fixtures to use Redis 8.0 instead of 6.2
platformifier/platformifier_test.go	Updated test data with new version arrays and runtime versions
platformifier/templates/upsun/.upsun/config.yaml	Updated commented example from PostgreSQL 14 to 17
platformifier/templates/generic/.platform/services.yaml	Updated commented example from PostgreSQL 14 to 17

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[spk]

LGTM