Need better error message than stacktrace dump

[chenrui333]

Problem

When trying to run tx pull with misconfigured .tx/config, I saw some stacktrace dump as below

# Getting info about resources

panic: runtime error: integer divide by zero

goroutine 1 [running]:
github.com/transifex/cli/pkg/worker_pool.makeProgressBar(0x0, 0x0, 0x140001128a0, 0x140001faa00)
	/home/runner/work/cli/cli/pkg/worker_pool/main.go:249 +0x18c
github.com/transifex/cli/pkg/worker_pool.(*Pool).Start(0x140001faa00)
	/home/runner/work/cli/cli/pkg/worker_pool/main.go:228 +0x2d8
github.com/transifex/cli/internal/txlib.PullCommand(0x140001fe450, 0x1400013c5a0, 0x14000206280, 0x0, 0x0)
	/home/runner/work/cli/cli/internal/txlib/pull.go:63 +0x320
github.com/transifex/cli/cmd/tx.Main.func5(0x140001fa900, 0x13, 0x24)
	/home/runner/work/cli/cli/cmd/tx/main.go:592 +0xa04
github.com/urfave/cli/v2.(*Command).Run(0x140001f6000, 0x140001fa140, 0x0, 0x0)
	/home/runner/go/pkg/mod/github.com/urfave/cli/[email protected]/command.go:163 +0x3c8
github.com/urfave/cli/v2.(*App).RunContext(0x14000123d40, 0x1053318a0, 0x14000136008, 0x14000110050, 0x5, 0x5, 0x0, 0x0)
	/home/runner/go/pkg/mod/github.com/urfave/cli/[email protected]/app.go:313 +0x5ec
github.com/urfave/cli/v2.(*App).Run(...)
	/home/runner/go/pkg/mod/github.com/urfave/cli/[email protected]/app.go:224
github.com/transifex/cli/cmd/tx.Main()
	/home/runner/work/cli/cli/cmd/tx/main.go:1029 +0x266c
main.main()
	/home/runner/work/cli/cli/main.go:5 +0x20

I would be better to display more user-friendly error messages rather than the stacktrace dump.

[codegaze]

Hello @chenrui333, thanks for bringing this to our attention.
Could you please provide a txconfig example that can reproduce this behaviour?