Add unit tests for transformTransactions function

[coderabbitai]

As per the discussion in PR #98 (#98), we need to add unit tests for the transformTransactions function in hooks/useQueries.ts to verify its correctness and robustness.

Reference comment: #98 (comment)

Requested by: @fmorency

[coderabbitai]

Here are the unit tests for the `transformTransactions` function:

```typescript
// hooks/useQueries.test.ts

import { transformTransactions, HistoryTxType } from './useQueries';

describe('transformTransactions', () => {
// ... (unit tests code from above)
});

```

[fmorency]

Will test using public facing methods.