[MCP] Configuration validation and UX improvements

[onbuyuka]

Summary

This PR enhances the MCP (Model Context Protocol) configuration management with validation capabilities, system tools display, and improved user experience in the configuration card.

Changes

Configuration Validation Framework

• Added ValidateConfiguration procedure to detect configuration issues before activation
• Introduced extensible warning system using interface pattern:
  • Interface: MCP Config Warning - defines WarningMessage, RecommendedAction, and ApplyRecommendedAction procedures
  • Enum: MCP Config Warning Type - implements the interface with warning types
  • Implementations: MCP Config Missing Object and MCP Config Missing Parent codeunits
• New MCP Config Warning temporary table to store validation warnings
• New MCP Config Warning List page to display and act on warnings
• Validation automatically runs when activating a configuration with option to review warnings

System Tools Display

• Added MCP System Tool temporary table to represent built-in MCP tools
• Added MCP System Tool List page part to display system tools (bc_action_describe, bc_action_invoke, bc_action_search)
• System tools are now visible in Dynamic Tool Mode on the configuration card

Configuration Card UX Improvements

• Added Tool Mode description field explaining Static vs Dynamic tool modes
• Added Validate action to manually validate configuration
• Improved field editability:
  • Name and Description are now read-only when configuration is active
  • Tool list is read-only when configuration is active
  • Add Tools by API Group and Add All Standard APIs actions disabled when configuration is active
• Removed sandbox-specific logic for create/update/delete permissions (now controlled by AllowProdChanges setting)

Work Item(s)

Fixes AB#615692
Fixes AB#618185