Add inspection data models

[roncodes]

Summary

• add shared FleetOps inspection form, submission, and item result Ember Data models
• add serializers for inspection resources and app reexports for host/module reuse
• keep inspection data contracts available through @fleetbase/fleetops-data instead of fleetops-engine-local models

Verification

• PATH=/opt/homebrew/bin:/Users/ron/.nvm/versions/node/v22.22.2/bin:$PATH pnpm exec eslint addon/models/inspection-form.js addon/models/inspection-submission.js addon/models/inspection-item-result.js addon/serializers/inspection-form.js addon/serializers/inspection-submission.js addon/serializers/inspection-item-result.js app/models/inspection-form.js app/models/inspection-submission.js app/models/inspection-item-result.js app/serializers/inspection-form.js app/serializers/inspection-submission.js app/serializers/inspection-item-result.js
• git diff --check