Create a method that performs bulk insert operations on Account records.

Parameters:

• accounts (List<Account>): List of Account records to insert

Returns:

• Integer: The number of accounts successfully inserted, or 0 if none

Requirements:

• Use DML bulk insert operation
• Handle null or empty accounts list by returning 0
• Handle DML exceptions gracefully
• Return the count of successfully inserted records

Example:

List<Account> accounts = new List<Account>{
    new Account(Name = 'Acme Corp', BillingCountry = 'USA')
};
Integer inserted = bulkInsertAccounts(accounts);
// Returns: 1