v0.4.0

Changelog

• 6feb134 feat: add clusters kubeconfig command
• 319a7f0 feat: add interactive exec command for pod shell access
• 8899e3f feat: add interactive workspace switch with CNAP-branded huh theme
• ffe5d07 feat: session auth, interactive pickers, and confirmation prompts
• 42b653e feat: update client for Stripe-aligned API conventions
• e4839ee fix: extract exec into platform-specific files for Windows builds
• cbaa2ab fix: handle errcheck lint errors in exec command