Function: grep
Description: This tool belongs to the Gorilla file system. It is a simple file system that allows users to perform basic file operations such as navigating directories, creating files and directories, reading and writing to files, etc. Tool description: Search for lines in a file of any extension at current directory that contain the specified pattern.
Parameters:
type: dict
properties: file_name: type: string
description: The name of the file to search. No path is allowed and you can only perform on file at local directory.
pattern: type: string
description: The pattern to search for. 
required: file_name, pattern
Response:
type: dict
properties: matching_lines: type: array
description: Lines that match the pattern.
items: type: string