adding script for generating SRS files based on a directory with CSV files

[WendelHime]

No description provided.

[Copilot]

Pull Request Overview

This PR adds functionality to convert CSV rule files into SRS (sing-box rule set) format. The implementation includes a command-line tool that processes a directory of CSV files and generates corresponding binary SRS files.

Key Changes:

• Added Go module dependencies required for SRS file generation
• Created a new command-line utility that reads CSV files containing network rules and converts them to SRS format
• Implemented CSV parsing logic that supports multiple rule types (domain, domain_suffix, package_name, process_name, ip_cidr)

Reviewed Changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 3 comments.

File	Description
go.mod	Initializes Go module with dependencies for sing-box integration and SRS file generation
cmd/csv_to_srs/main.go	Implements CSV-to-SRS conversion utility with file walking, parsing, and rule set generation

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