Add sanity checks for config options

[vsmxd]

trafficstars

Changes

• Added sanity checks for config options in legacy network component
• Validates max_bots vs max_players configuration
• Checks and corrects negative values in network settings
• Warns when query is disabled but announce is enabled
• Added warning for scriptfiles directory creation in Pawn component

Testing

• [x] Changes are minimal and focused
• [x] No new dependencies added
• [x] Warnings are clear and informative

Fixes #611