[Feature]: Native "Move active window to next display" action (or working CustomShortcut path to Win+Shift+Arrow on Windows)

Hi! I would love a built-in action that moves the current foreground window to the next monitor — similar in spirit to #635 / #894 (native window-management actions). Either of these would work:

1. **A native `MoveWindowNextDisplay` / `MoveWindowPreviousDisplay` action** in the catalog. On Windows it could synthesize Win+Shift+←/→; macOS/Linux have their own equivalents.

2. **Or fix the CustomShortcut path so it can send the Win key on Windows.** Currently `post_custom_shortcut` in `crates/openlogi-inject/src/inject/windows.rs` maps `has_command()` → `VK_CONTROL`, so writing `CustomShortcut = "Win+Shift+Right"` actually produces Ctrl+Shift+Right, and there is no way at all to reach very common Win-key chords (Win+Shift+Arrow for displays, Win+Arrow snapping, etc.). A dedicated `Meta` modifier that maps to `VK_LWIN` would unlock all of these.

Use case: binding a mouse side button (e.g. Back) to toss the current window to my second monitor. Today the only workaround is a `RunShellCommand` PowerShell script, but since the agent runs it via `cmd /C`, the console window steals focus and breaks foreground-window detection.

Thanks for the great project!

Start in crates/openlogi-inject/src/inject/windows.rs, especially post_custom_shortcut and its has_command() mapping. Compare the two proposed approaches and trace the existing action or shortcut path before choosing a scope. Done means the selected path can trigger Win+Shift+Arrow without the PowerShell workaround and preserves foreground-window behavior.

Written by the indexing model from the issue text.