refactor(machines) : remove TypeMachine skeleton system, simplify machine creation
- Remove TypeEdit*, TypeInfoDisplay, MachineSkeletonSummary, MachineCreatePreview components
- Remove machine-skeleton pages and type pages
- Remove useMachineTypesApi, useMachineSkeletonEditor, useMachineCreateSelections composables
- Add AddEntityToMachineModal for direct entity linking
- Update machine detail/create pages for direct custom fields
- Fix SearchSelect, category display, and ipartial search filters
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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