Add Inputs.SetCursorShape to Lua scripting

[AADITYA007x]

Description

Adds Inputs.SetCursorShape(shape) and a CursorShape enum (ARROW, IBEAM, CROSSHAIR, HAND, HRESIZE, VRESIZE) to the Lua bindings, plus Lua annotation files for editor autocomplete. Tested in the editor by switching shapes from a script at runtime.

Related Issue(s)

Closes #849

Review Guidance

Changes are small: one new binding in LuaGlobalBindings.cpp (the CursorShape enum and Inputs.SetCursorShape, which calls the existing Window::SetCursorShape), plus Lua annotations in Inputs.lua and a new CursorShape.lua.

To test: attach a script to an actor that calls Inputs.SetCursorShape(CursorShape.HAND) (or IBEAM, CROSSHAIR, ARROW) from OnUpdate on a key press, then press Play and check that the cursor changes over the Game View.

Screenshots/GIFs

Console output while playing a test script that calls `Inputs.SetCursorShape(...)`: both `Inputs.SetCursorShape` and `CursorShape` are available to Lua. The cursor changed to HAND / IBEAM / CROSSHAIR / ARROW when the matching key was pressed in the Game View.

AI Usage Disclosure

I used Claude to help with the implementation and testing steps

Checklist

• My code follows the project's code style guidelines
• When applicable, I have commented my code, particularly in hard-to-understand areas
• When applicable, I have updated the documentation accordingly
• My changes don't generate new warnings or errors
• I have reviewed and take responsibility for all code in this PR (including any AI-assisted contributions)