Categorize converted files by domain and teams

After conversion, categorize the files by domain and teams. In this case, we will have a measurement about how much work can be achieved by other teams and reference for planning the future work.

```
Level 1
metamask-controller.js

Level 2
app/scripts/controllers/detect-tokens.js
app/scripts/controllers/ens/index.js
app/scripts/controllers/metametrics.js
app/scripts/controllers/swaps.js
app/scripts/lib/ComposableObservableStore.js
app/scripts/lib/createMetaRPCHandler.js
app/scripts/lib/createRPCMethodTrackingMiddleware.js

Level 3
App/scripts/controllers/alert.js
App/scripts/controllers/app-state.js
App/scripts/controllers/onboarding.js
App/scripts/controllers/permissions/index
app/scripts/detect-multiple-instances.js
app/scripts/lib/account-tracker.js
app/scripts/lib/createLoggerMiddleware.js
app/scripts/lib/createOnboardingMiddleware.js
app/scripts/lib/createOriginMiddleware.js
app/scripts/lib/createTabIdMiddleware.js
app/scripts/lib/rpc-method-middleware/index.js
app/scripts/lib/stream-utils.js

Level 4
shared/modules/mv3.utils.js
app/scripts/controllers/permissions/background-api.js
app/scripts/controllers/permissions/caveat-mutators.js
app/scripts/controllers/permissions/permission-log.js
app/scripts/controllers/permissions/selector.js
app/scripts/controllers/permissions/specifications.js
app/scripts/lib/rpc-method-middleware/createMethodMiddleware.js

Level 5
app/scripts/controllers/permissions/enum.js
app/scripts/lib/rpc-method-middleware/handlers/index.js

Level 6
app/scripts/lib/rpc-method-middleware/handlers/add-ethereum-chain.js
app/scripts/lib/rpc-method-middleware/handlers/eth-accounts.js
app/scripts/lib/rpc-method-middleware/handlers/get-provider-state.js
app/scripts/lib/rpc-method-middleware/handlers/log-web3-shim-usage.js
app/scripts/lib/rpc-method-middleware/handlers/request-accounts.js
app/scripts/lib/rpc-method-middleware/handlers/send-metadata.js
app/scripts/lib/rpc-method-middleware/handlers/switch-ethereum-chain.js
app/scripts/lib/rpc-method-middleware/handlers/watch-asset.js

Level 13
development/lib/build-type.js

Level 19
shared/modules/transaction.utils.js
shared/notifications/index.js
```

Review the listed files, starting with metamask-controller.js and the Level 2–3 app/scripts entries, then compare them with development/lib/build-type.js and shared/modules/transaction.utils.js. Define a consistent domain and team categorization for every listed level, with the completed inventory serving as the planning reference described in the issue.

Written by the indexing model from the issue text.