Implement layout-agnostic keyboard input

[o-sdn-o]

Breaking Changes

• This release is not backward compatible.
• Replace the following key bindings on Unix-like platforms:
  • Alt+Z -> Esc+F1 (FocusTaskbar)
  • Alt+Shift+B -> Ctrl-Alt (ExclusiveKeyboardMode in terminal)

Changes

• Implement layout-agnostic keyboard input (Abstract Latin Layout, ALL (+KKP support) #943):
  • Introduce the Abstract Latin Layout "ALL" (evoking "All", tracking 309 unique physical keys normalized from 87 distinct OS layouts): Decouple physical key codes from national OS layouts, ensuring consistent runtime behavior across different language inputs.
  • Implement the Win32Api/KKP -> ALL mapping pipeline (ALL -> KKP generation is forthcoming).
• Rename LeftWin/RightWin modifier keys to LeftSuper/RightSuper.
• Decouple AltGr from RightAlt globally (they are no longer treated as equivalent).
• Fix RightCtrl/RightAlt translation anomalies on Canadian and Korean layouts.
• Respect AltGr and IsoLevel5Shift (GroupSelect on Canadian layouts) states when evaluating key chords.
• Add a workaround for the RightAlt extended-key flag bug in native Win32 console API reports.
• Filter out and exclude Shift, AltGr, and Level5Shift modifier keys from literal chord sequences.
• Fix Pause, Break, PrintScreen, and SysRq press/release transaction emulation.
• Fix invalid key-chord states (prevent stuck keys when an IME is active).
• Fix an infinite loop triggered when synchronizing empty grapheme cluster lists (mitigate fake jumbo clusters on malformed UTF-8 output).
• Implement a dead-key preview mechanism in the built-in terminal.
• Configure LunaSVG and STB to be fetched automatically via CMake if not found in the system LunaSVG is not available on Debian #944.