[Enhancement] Implement optional clipping and multi-line wrapping in GuiKeyValueDisplay

[oznogon]

Issue

GuiKeyValueDisplay lacks overflow text handling, leading to issues with shield segment displays (#2648) and science database k/v contents.

Suggested fix

Implement existing improvements to wrap/clip state management to allow keys and values to wrap to additional lines. Either handle background scaling similarly to other elements, or implement sliced backgrounds capable of arbitrary scaling.