feat: Add procedural SVG animations for playing/shaking and laser_mode_changed signal

[mx57]

Added procedural SVG animations for 'playing' (rocking and bouncing) and 'shaking' (intense shaking and dynamic scaling) in AnimationManager.update_frame. Added laser_mode_changed signal in InputManager and synced its state with TrayMenu laser_action checkmark. Added unit tests for new functionality.

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PR created automatically by Jules for task 229236920081670765 started by @mx57

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