feat(cli): add --version and -v support

[satococoa]

Summary

• wire root command Version in urfave/cli
• enable built-in --version / -v output
• add unit and integration tests for version flags
• inject release version via Goreleaser ldflags
• document version flag usage in README

Testing

• go test ./...
• go run ./cmd/git-worktreeinclude --version
• go run ./cmd/git-worktreeinclude -v

Summary by CodeRabbit

• New Features

  • Implemented version flag support (--version and -v) for the CLI tool, allowing users to view the current application version.

• Documentation

  • Updated README to document the version flag feature with usage examples and expected output.

• Tests

  • Added tests to verify version flag functionality and output format consistency.

[coderabbitai]

@satococoa Sure, I'll review the changes in this PR now!

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Review triggered.

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[Copilot]

@satococoa I've opened a new pull request, #9, to work on those changes. Once the pull request is ready, I'll request review from you.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 6ea88197-7c7b-45b9-b36b-27e3f3701948

📥 Commits

Reviewing files that changed from the base of the PR and between 7678c66 and 9393d8a.

📒 Files selected for processing (1)

• internal/cli/cli_unit_test.go

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📝 Walkthrough

Walkthrough

Adds a build-time injectable Version variable, exposes it on the CLI root command (supporting --version and -v), updates goreleaser to set the value at link time, and adds unit and integration tests plus README documentation for the flag.

Changes

Cohort / File(s)	Summary
Build config \.goreleaser\.yml	Adds an ldflag (-X ...) to inject the internal/cli.Version value at link time.
CLI implementation internal/cli/cli.go	Introduces var Version = "dev" and sets the root command's Version field to this variable.
Tests internal/cli/cli_integration_test.go, internal/cli/cli_unit_test.go	Adds TestRootVersionFlags (integration) and TestRunRootVersion (unit) to verify --version and -v outputs, exit codes, and stdout/stderr behavior.
Documentation README.md	Adds documentation and examples for --version / -v usage and sample output.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Poem

🐰 I nibble a flag into the tree,
A build-time name sewn proudly on me,
Tests hop around to make it right,
Docs sing the version into the light,
Cheers for the tag — a tiny release delight!

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The PR title clearly and concisely summarizes the main change: adding --version and -v flag support to the CLI.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

• 📝 Generate docstrings (stacked PR)
• 📝 Generate docstrings (commit on current branch)

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch codex/add-version-flags

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[Copilot]

Pull request overview

This PR adds --version / -v flag support to the git-worktreeinclude CLI by wiring in urfave/cli's built-in version mechanism, injecting the release version string at build time via goreleaser ldflags, and adding documentation and test coverage for both flags.

Changes:

• Wire Version package-level variable into urfave/cli's Command.Version field, enabling built-in --version and -v output
• Inject version at build time via goreleaser ldflags and default to "dev" for local builds
• Add unit and integration tests for version flag behavior, and document the flags in README

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
internal/cli/cli.go	Adds var Version = "dev" global and wires it into newRootCommand()'s Version field
internal/cli/cli_unit_test.go	Adds TestRunRootVersion testing --version output and stdout/stderr correctness
internal/cli/cli_integration_test.go	Adds TestRootVersionFlags looping over --version and -v, verifying output format against the built binary
.goreleaser.yml	Extends ldflags to inject the release version into internal/cli.Version
README.md	Adds --version / -v command section under the Commands heading

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[satococoa]

Addressed Copilot feedback in 9393d8a: TestRunRootVersion now validates both --version and -v.