feat(filesystem): add read_file_lines

[altrao]

Description

• read_file_lines: Reads specific lines from files with offset/limit

Server Details

• Server: filesystem
• Changes to: tools

Motivation and Context

Allows partial reading of files by specifying an offset and a limit when the whole file content isn't necessary.

How Has This Been Tested?

Testing completed for read_file_lines:

1. Basic functionality:
   • Various offsets and limits
2. Security boundaries:
   • Only works in allowed dir
3. Edge cases:
   • Empty files
   • Offsets beyond file length
   • Large limits
   • Negative offset
   • Negative limit
   • Special characters in filenames
   • Large files (high line numbers)
   • Different file formats
4. Error handling:
   • Invalid paths (proper error returned)
   • Invalid parameters (proper validation)

Breaking Changes

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Protocol Documentation
• My changes follows MCP security best practices
• I have updated the server's README accordingly
• I have tested this with an LLM client
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have documented all environment variables and configuration options

Additional context

The implementation uses readline.craeteInterface and fs/promise.FileHandle.createReadStream for reading file's content with a stream. Please take a look at that and bring up any concern. Node isn't my safe zone but I tried handling it with some performance concerns in mind.