Make v3 examples runnable on pkg.go.dev

[matthewdale]

What type of PR is this?

• documentation

What this PR does / why we need it:

Makes the examples rendered on pkg.go.dev runnable for v3.

Which issue(s) this PR fixes:

Fixes #1811.

Testing

1. Install pkgsite.

go install golang.org/x/pkgsite/cmd/pkgsite@latest

2. Browse to the cli repository root.
3. Run pkgsite

pkgsite

4. Browse to http://localhost:8080/github.com/urfave/cli/v3#example-Command.Run-NoAction

The existing examples have no main function and are not runnable:

The fixed examples have a main and a "Run" button:

Release Notes

Make v3 examples runnable on pkg.go.dev.

[github-actions]

Frogbot also supports Contextual Analysis, Secret Detection and IaC Vulnerabilities Scanning. This features are included as part of the JFrog Advanced Security package, which isn't enabled on your system.

---

🐸 JFrog Frogbot