336 cran warning futilelogger set to be archived

[bburns632]

This replaces the futile.logger dependency with a custom base R logging class (resolves #336). This is necessary to maintain Pkgnet on CRAN. Thank you past contributors for making this one straightforward via the wrapper on the logger (blame view shows @jameslamb )!

In the process, I also configured this project to be able to leverage Claude Code for quick assistance.

Changes Made

0: Configure Repo for Claude Code

• Added CLAUDE.md at root
• Update .Rbuildignore to ignore this file

1. Created Custom Logger Class

File: R/logging.R

• Implemented SimpleLogger R6 class using only base R functions (message(), warning(), stop())
• Supports three log levels: INFO (4), WARN (5), and FATAL (6)
• Includes threshold-based filtering
• Package-level singleton instance via .get_logger()

2. Maintained Wrapper Functions

File: R/logging.R

• log_info() - logs informational messages
• log_warn() - logs warnings and triggers R warning()
• log_fatal() - logs fatal errors and triggers R stop()
• silence_logger() - sets threshold to 0 (silent)
• unsilence_logger() - sets threshold to 4 (INFO level)

3. Created Comprehensive Unit Tests

File: tests/testthat/test-logging.R

• Tests for SimpleLogger class functionality
• Tests for threshold management
• Tests for wrapper functions
• Tests for silence/unsilence behavior

4. Updated Test Setup/Teardown

• Modified tests/testthat/setup-logger.R to use new logger
• Modified tests/testthat/teardown-logger.R to use new logger

5. Removed futile.logger Dependency

• Removed from DESCRIPTION Imports section
• Removed from .github/workflows/smoke-tests.yaml workflow
• All source code references replaced

What Was NOT Changed

• All existing log_info/log_warn/log_fatal calls throughout the codebase remain unchanged (though they now use the new logger). Thanks contributors for foresight on this one!

Outcome

The implementation maintains backward compatibility with all existing logging calls while removing the external dependency. All tests pass.