chore: Improve error messages

currently:

> stackablectl stack install trino-iceberg
An unrecoverable error occured: failed to execute stack (sub)command

Caused by these errors (recent errors listed first):
 1: failed to install stack
 2: stack resource requests error
 3: failed to create kube client
 4: failed to create Kubernetes client
 5: Failed to infer configuration
 6: failed to infer config
 7: failed to determine current context

This is a bit cryptic. it would be good to catch this error and print a more readable message like "could not connect to Kubernetes cluster" or "No Kubernetes configuration found" or something like that. Possibly with context information like "tried connecting to ..." or "tried reading file at ..."

Commencez par la commande stackablectl stack install trino-iceberg et suivez les erreurs signalées du client Kubernetes et d’inférence de configuration. Le travail est terminé lorsque la chaîne d’erreurs imbriquées et cryptiques est remplacée par des messages lisibles, tels que des indications concernant la connexion ou une configuration manquante, avec le contexte pertinent lorsqu’il est disponible.