chore: remove unused github.com/fatih/color

[alexandear]

Summary

Removes the unused github.com/fatih/color dependency.

Why

The fatih/color package was unused in the codebase. This can be detected via go mod tidy. To prevent future regressions, this step was added in place of go mod download. Additionally, a workaround is needed on Windows to handle CRLF line endings that cause go mod tidy -diff to fail during CI runs.

What changed

• Removed github.com/fatih/color from go.mod and go.sum
• Cleaned up transitive dependencies that were only pulled in by fatih/color
• Changed CI workflow from go mod download to go mod tidy -diff for better dependency validation
• Added a pre-checkout step on Windows to configure Git to use LF line endings

MCP impact

• No tool or API changes
• Tool schema or behavior changed
• New tool added

Prompts tested (tool changes only)

• N/A

Security / limits

• No security or limits impact
• Auth / permissions considered
• Data exposure, filtering, or token/size limits considered

Tool renaming

• I am renaming tools as part of this PR (e.g. a part of a consolidation effort)
  • I have added the new tool aliases in deprecated_tool_aliases.go
• I am not renaming tools as part of this PR

Lint & tests

• Linted locally with ./script/lint
• [] Tested locally with ./script/test

Docs

• Not needed
• Updated (README / docs / examples)

[Copilot]

Pull request overview

This PR removes the unused github.com/fatih/color dependency and improves CI validation by enforcing clean module files.

Changes:

• Removed unused github.com/fatih/color dependency and its transitive dependencies (mattn/go-colorable, mattn/go-isatty)
• Updated CI workflow to validate module file cleanliness with go mod tidy -diff instead of just downloading dependencies

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
go.mod	Removed github.com/fatih/color from require block and reflowed indirect dependencies alphabetically
go.sum	Removed checksums for fatih/color, mattn/go-colorable, mattn/go-isatty, and related golang.org/x/sys entries
.github/workflows/go.yml	Changed CI step from go mod download to go mod tidy -diff to enforce module file discipline

[Copilot]

Pull request overview

Copilot reviewed 2 out of 3 changed files in this pull request and generated no new comments.

Comments suppressed due to low confidence (1)

go.mod:14

• According to the project's coding guidelines, when dependencies are changed, you should run script/licenses to update the third-party license files. Please verify that script/licenses has been run and commit any changes to the third-party-licenses.*.md files if they were updated. This ensures license compliance is maintained.

go 1.24.0

require (
	github.com/google/go-github/v79 v79.0.0
	github.com/google/jsonschema-go v0.4.2
	github.com/josephburnett/jd v1.9.2
	github.com/microcosm-cc/bluemonday v1.0.27
	github.com/muesli/cache2go v0.0.0-20221011235721-518229cd8021
	github.com/spf13/cobra v1.10.2
	github.com/spf13/viper v1.21.0
	github.com/stretchr/testify v1.11.1
)