AccountType.Public is undefined because AccountType is shadowed

### Packages versions

@miden-sdk/miden-sdk@0.16.0-rc.5

### Bug description

The exported `AccountType` contains `FungibleFaucet` and `NonFungibleFaucet` instead of the native `Private` and `Public` values. Because of this, `AccountType.Public` is undefined.
The faucet enum should be renamed to `FaucetType`, allowing the native `AccountType` to be exported.

`storageMode(AccountStorageMode.public())` works as a workaround.

### How can this be reproduced?

```javascript
import { AccountBuilder, AccountType } from "@miden-sdk/miden-sdk";

const seed = new Uint8Array(32);
new AccountBuilder(seed).accountType(AccountType.Public);
```

### Relevant log output

```shell
Failed to convert napi value into enum `AccountType`. NumberExpected, Failed to convert napi value Undefined into rust type `i32`
```

Look for the exported AccountType enum in the SDK source, likely in a file like src/account.ts or src/types.ts. Identify where the FaucetType values are incorrectly placed. Rename the faucet enum to FaucetType and ensure the native AccountType with Private and Public is correctly exported. Verify the fix by running the provided reproduction code.

Written by the indexing model from the issue text.