Document when to use `_unhandled_key_input` over `_unhandled_input`#42100

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YuriSizov merged 1 commit intogodotengine:masterfrom groud:document_unhandled_key_input

Sep 14, 2023

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Commits on Sep 12, 2023

Document why use either _unhandled_key_input, _shortcut_input or _unhandled_input
groud
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