refactor(accounts-controller)!: revert wildcard export (#5300)

## Explanation

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Using a wildcard export in the root `index.ts` of a package is,
regrettably, not an ideal practice. This file is very useful because it
gives us a way to understand everything that a package publicly exports
at a glance.

In using a wildcard export, however, we lose this visibility. Because
all symbols marked with `export` will automatically become exports of
the package, it is possible to introduce a new export without even
knowing about it. We also lose the ability to export a symbol purely for
internal purposes, which is useful for tests.

As it relates to the change being reverted, because of the introduction
of this wildcard export, new exports have been introduced which will now
need to be reverted in a new major version, namely `AllowedActions` and
`AllowedEvents`. This is non-ideal; we should not have to introduce
major versions if we do not need to, because they are disruptive.

Elsewhere it was noted that needing to add an export manually to this
list is a small pain point especially if other subdirectories also use
`index.ts`. I would argue that not knowing about exports (regardless of
at which level exports occur) creates _more_ trouble in the long run.
That is, the small pain point is a intentional feature and not a bug :)

## References

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* Fixes #12345
* Related to #67890
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See #5224.

## Changelog

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(None; no functional changes)

## Checklist

- [x] I've updated the test suite for new or updated code as appropriate
- [x] I've updated documentation (JSDoc, Markdown, etc.) for new or
updated code as appropriate
- [x] I've highlighted breaking changes using the "BREAKING" category
above as appropriate
- [x] I've prepared draft pull requests for clients and consumer
packages to resolve any breaking changes

packages/accounts-controller/src/index.ts

@@ -1,2 +1,37 @@
-export * from './AccountsController';
-export * from './utils';
+export type {
+  AccountId,
+  AccountsControllerState,
+  AccountsControllerGetStateAction,
+  AccountsControllerSetSelectedAccountAction,
+  AccountsControllerSetAccountNameAction,
+  AccountsControllerListAccountsAction,
+  AccountsControllerListMultichainAccountsAction,
+  AccountsControllerUpdateAccountsAction,
+  AccountsControllerGetSelectedAccountAction,
+  AccountsControllerGetSelectedMultichainAccountAction,
+  AccountsControllerGetAccountByAddressAction,
+  AccountsControllerGetNextAvailableAccountNameAction,
+  AccountsControllerGetAccountAction,
+  AccountsControllerUpdateAccountMetadataAction,
+  AllowedActions,
+  AccountsControllerActions,
+  AccountsControllerChangeEvent,
+  AccountsControllerSelectedAccountChangeEvent,
+  AccountsControllerSelectedEvmAccountChangeEvent,
+  AccountsControllerAccountAddedEvent,
+  AccountsControllerAccountRemovedEvent,
+  AccountsControllerAccountRenamedEvent,
+  AccountsControllerAccountBalancesUpdatesEvent,
+  AccountsControllerAccountTransactionsUpdatedEvent,
+  AccountsControllerAccountAssetListUpdatedEvent,
+  AllowedEvents,
+  AccountsControllerEvents,
+  AccountsControllerMessenger,
+} from './AccountsController';
+export { EMPTY_ACCOUNT, AccountsController } from './AccountsController';
+export {
+  keyringTypeToName,
+  getUUIDOptionsFromAddressOfNormalAccount,
+  getUUIDFromAddressOfNormalAccount,
+  isNormalKeyringType,
+} from './utils';