Create slide-in panel component with layout and animations

[ChristianHuehn]

Feature request

Part of Epic #136

Description

As a developer, I want to create the basic slide-in panel component with proper layout and animations so that we have the foundation for displaying node information.

Acceptance criteria

• Angular component created for slide-in panel
• Panel slides in from the right side of the screen
• Smooth slide-in and slide-out animations implemented
• Panel has proper z-index to overlay the visualization
• Panel layout includes header section and content area
• Panel does not affect the graph layout when opening/closing
• Panel is responsive and works on different screen sizes

Assumptions & Exclusions

• Panel slides from right side only (not configurable)
• Fixed width panel (not resizable in this iteration)
• Basic layout structure only - actual content display handled in separate issues

Development notes (optional Task Breakdown)

• Create Angular component structure
• Implement CSS animations for slide-in/slide-out
• Add proper styling and z-index layering
• Create header section with placeholder for close button
• Create content area for future information display
• Test responsiveness on different screen sizes

Open questions

None - basic structure requirements are clear.