Feature: Improving CI/CD for `Kubeslice-cli`repo

[Arpit529Srivastava]

🔖 Feature description

Implement three essential GH Actions workflows for kubeslice-cli:

• CLI Testing Workflow: Automatically runs and verifies major CLI commands (e.g., --help, invalid input handling).

• Cross-Platform Build Workflow: Builds CLI binaries for all major platforms and architectures (Linux, macOS, Windows; amd64/arm64), and provides them as downloadable release artifacts.

• Code Quality and Linting Workflow: Integrates tools like golangci-lint to enforce formatting, dependency checks, and security standards.

🎤 Pitch

Automating CLI tests, cross-platform builds, and linting will quickly catch bugs, ensure users get working binaries for all systems, and keep code quality high with minimal manual effort.

✌️ Solution

• Add .github/workflows/cli-testing.yml to verify key CLI commands and argument error handling on every PR/push.

• Add .github/workflows/cross-platform.yml to matrix-build binaries for {linux, darwin, windows} × {amd64, arm64} and upload artifacts.

• Add .github/workflows/lint.yml to run golangci-lint run --timeout=5m (or similar) on all PRs/pushes.

• Optionally, update contributor docs to mention automatic checks and artifacts in PR/release process.

🔄️ Alternative

take a look here
https://kubernetes.slack.com/archives/C03Q64HNEJF/p1754187823984139

👀 Have you spent some time to check if this issue has been raised before?

• I checked and didn't find similar issue

🏢 Have you read the Code of Conduct?

• I have read the Code of Conduct

[Arpit529Srivastava]

PTAL @priyupadhyay @narmidm @gourishkb.