feat: Implement Tool Rendering Pipeline for Modern Layout System

[sandesh-sp]

Purpose

• Implement complete tool rendering pipeline enabling dynamic tool placement in custom dashboard panels.
• Establish tool metadata validation, assignment, and lifecycle management.
• Create Title plugin as a test plugin

Proposed Changes

• Refactored ToolControllerModern_, UserInterfaceModern_, and PanelManager_ to enable dynamic tool placement with orientation compatibility checks, supported by corresponding updates to the configuration UI.
• Polished panel and tool card visuals by removing unnecessary padding and borders.

Issues

• closes Build title plugin #56 and Layout system: Update ToolController_.js to support new panel layout #26

Testing

• Title Tool renders successfully in configured panels.
• Tool assignment algorithm correctly handles explicit and fallback assignments.