Improve user experience for big List.range calls

[Anton-4]

Relocated from roc-lang/examples#199. issue reported by @alexpyattaev:

The example below segfaults on roc --version:
roc nightly pre-release, built from commit faeea52 on Fr 23 Aug 2024 09:01:42 UTC
There are no compilation errors of any kind.

app [main] { pf: platform "https://github.com/roc-lang/basic-cli/releases/download/0.14.0/dC5ceT962N_4jmoyoffVdphJ_4GlW3YMhAPyGPr-nU0.tar.br" }

import pf.Stdout
import pf.Task

loop = \i, max ->
    if i < max then
        i + loop (i + 1) max
    else
        i

main =
    x = 1000 * 1000 * 1000
    z = loop 0 x
    # z = List.range {start: At 0, end: Before x} |> List.walk 0 Num.add
    Stdout.line! "Hello, World! $(Num.toStr z)"

The commented out line was the other attempt at computing the same sum, which resulted in OOM kill of the process as it tried to allocate 1 billion element long List. Not sure why, but it was clearly unnecessary here.

changing the loop impl to this makes the thing work correctly, but it is ugly as sin and not obvious for the user to figure out what the problem is.

loop = \sum, i, max ->
    if i < max then
        loop (sum + i) (i + 1) max
    else
        sum

[Anton-4]

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