Add app logs command for viewing application logs #23

It would be useful to have a CLI command for viewing application logs directly from the terminal, similar to docker service logs.

Proposed feature

A new dokploy app logs command that supports:

• Fetching recent logs with configurable --tail count
• Live streaming with --follow (-f)
• Time-based filtering with --since (e.g. 30m, 1h, 2d, all)
• Keyword filtering with --search
• Non-interactive usage via --applicationId, --projectId, --environmentId flags
• Interactive project/environment/application selection when flags are omitted

Implementation notes

• Uses the existing /docker-container-logs WebSocket endpoint for log streaming
• Tries Docker Swarm mode first, falls back to native containers
• For Dokploy Cloud instances where WebSocket is unavailable, falls back to SSH-based docker service logs

Example usage

$ dokploy app logs                           # interactive selection
$ dokploy app logs -a myAppId -f             # stream logs
$ dokploy app logs -a myAppId --since 1h     # logs from last hour
$ dokploy app logs -a myAppId --search error # filter by keyword