Create a method that takes a list of accounts and groups them by industry into a Map. The key should be the industry name and the value should be a list of account names in that industry.

Examples:

Input: accounts = [Account(Name='TechCorp', Industry='Technology'), Account(Name='FinanceFirst', Industry='Banking'), Account(Name='DevTools', Industry='Technology')] Output: {'Technology' => ['TechCorp', 'DevTools'], 'Banking' => ['FinanceFirst']} Explanation: Accounts grouped by their industry field Input: accounts = [] Output: {} Explanation: Empty list returns empty map Input: accounts = [Account(Name='Mystery Co', Industry=null)] Output: {'Other' => ['Mystery Co']} Explanation: Null industry treated as 'Other'
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