Add .gitignore for Go gRPC project#3

Copilot wants to merge 2 commits intomainsebseb10/ChitChatPractice:mainfrom

copilot/add-gitignore-for-go-exercisesebseb10/ChitChatPractice:copilot/add-gitignore-for-go-exerciseCopy head branch name to clipboard