Function labelTransactions

labelTransactions(
    existingTransactions: Transaction[],
    newTransactions: Transaction[],
    promptFilename: string,
): Promise<Transaction[]>
Labels transactions using an LLM.
Parameters
- existingTransactions: Transaction[]
  The existing transactions.
- newTransactions: Transaction[]
  The new transactions.
- promptFilename: string
  The name of the prompt file.
Returns Promise<Transaction[]>
A promise that resolves to the labeled transactions.

Throws
An error if the labeling process fails.
- Defined in src/features/labelTransactions.ts:106