Add five new AppleScript commands to Ghostty.sdef mirroring the existing
App Intents for terminal input:
- `input text`: send text to a terminal as if pasted
- `send key`: simulate a keyboard event with optional action and modifiers
- `send mouse button`: send a mouse button press/release event
- `send mouse position`: send a mouse cursor position event
- `send mouse scroll`: send a scroll event with precision and momentum
A shared `input action` enumeration (press/release) is used by both key
and mouse button commands. Modifier keys are passed as a comma-separated
string parameter (shift, control, option, command).
Add two new AppleScript commands to the scripting dictionary:
- `focus terminal <terminal>` — focuses the given terminal and brings
its window to the front.
- `close terminal <terminal>` — closes the given terminal without a
confirmation prompt.
Each command is implemented as an NSScriptCommand subclass following
the same pattern as the existing split command.
Add a new `split` command to the AppleScript scripting dictionary that
splits a terminal in a given direction (right, left, down, up) and
returns the newly created terminal.
The command is exposed as:
split terminal <terminal> direction <direction>
Also adds a `fourCharCode` String extension for converting four-character
ASCII strings to their FourCharCode (UInt32) representation.
