fixes panic when api returns nil

[tnsardesai]

kernel browsers list panics when there are no browsers to list! Fixed and added a unit test for it 😄

I also didn't like that prod release is 4 commands so I vibed a script to do it

Previously

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x2 addr=0x0 pc=0x1025be884]

goroutine 1 [running]:
github.com/onkernel/cli/cmd.BrowsersCmd.List({{0x1029b10c8, 0x140000d2300}, {0x0, 0x0}, {0x0, 0x0}, {0x0, 0x0}, {0x0, 0x0}, ...}, ...)
	/Users/tanmaysardesai/github.com/onkernel/cli/cmd/browsers.go:222 +0x164
github.com/onkernel/cli/cmd.runBrowsersList(0x102e4a560, {0x10263262a?, 0x4?, 0x102632536?})
	/Users/tanmaysardesai/github.com/onkernel/cli/cmd/browsers.go:2128 +0x2ec
github.com/spf13/cobra.(*Command).execute(0x102e4a560, {0x102e80cc0, 0x0, 0x0})
	/Users/tanmaysardesai/go/pkg/mod/github.com/spf13/[email protected]/command.go:1015 +0x7d4
github.com/spf13/cobra.(*Command).ExecuteC(0x102e4ece0)
	/Users/tanmaysardesai/go/pkg/mod/github.com/spf13/[email protected]/command.go:1148 +0x350
github.com/spf13/cobra.(*Command).Execute(...)
	/Users/tanmaysardesai/go/pkg/mod/github.com/spf13/[email protected]/command.go:1071
github.com/spf13/cobra.(*Command).ExecuteContext(...)
	/Users/tanmaysardesai/go/pkg/mod/github.com/spf13/[email protected]/command.go:1064
github.com/charmbracelet/fang.Execute({0x1029ae0f8, 0x102e80cc0}, 0x102e4ece0, {0x14000223e98, 0x2, 0x2?})
	/Users/tanmaysardesai/go/pkg/mod/github.com/charmbracelet/[email protected]/fang.go:151 +0x320
github.com/onkernel/cli/cmd.Execute({{0x10285b4f8, 0x6}, {0x10285bce0, 0x28}, {0x10285bb50, 0x14}, {0x10285ba98, 0x8}})
	/Users/tanmaysardesai/github.com/onkernel/cli/cmd/root.go:164 +0x2e8
main.main()
	/Users/tanmaysardesai/github.com/onkernel/cli/cmd/kernel/main.go:17 +0x78

now

 INFO  No running browsers found

---

Note

Prevents a panic in kernel browsers list when the API returns no page, adds a unit test, and introduces a scripts/release.sh with updated release docs.

• CLI (browsers list)
  • Safely handle nil page from SDK in cmd/browsers.go and treat as empty results.
  • JSON output now prints [] when no items (len(browsers)==0).
  • Shows "No running browsers found" when empty instead of panicking.
• Tests
  • Add TestBrowsersList_PrintsEmptyMessagePageIsNil in cmd/browsers_test.go.
• Release
  • Add scripts/release.sh to tag, push, and run make release with basic version validation.
  • Update DEVELOPMENT.md to use git describe --abbrev=0 and ./scripts/release.sh <version> [description] for releases.

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[Sayan-]

great spot!