Only include ANSI color output if a user is logging to a terminal

[irees]

No description provided.

[Copilot]

Pull request overview

This PR adds conditional ANSI color output to the console logger, enabling colored output only when logging directly to a terminal and disabling colors when output is redirected or piped. This improves compatibility with log aggregation tools and file redirection scenarios.

• Added terminal detection using golang.org/x/term.IsTerminal() to conditionally enable/disable ANSI colors
• Updated dependencies to include golang.org/x/term package
• Added comprehensive test script and sample program to verify color behavior in different output scenarios

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
log.go	Implements terminal detection to conditionally disable ANSI colors in ConsoleWriter based on stdout file descriptor type
go.mod	Updates Go version and adds golang.org/x/term dependency along with updated golang.org/x/sys version
go.sum	Adds checksums for new golang.org/x/term and updated golang.org/x/sys dependencies
cmd/testlog/main.go	Adds test program demonstrating various logging methods for manual verification
cmd/testlog/test.sh	Adds shell script to test color output behavior in different scenarios (terminal, piped, redirected, JSON mode)

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.