TerminalView shifted down on Android/iOS due to MediaQuery padding

[jamiewest]

xterm.dart/lib/src/terminal_view.dart

Line 228 in d35ba2c

padding: MediaQuery.of(context).padding,

• TerminalView sets padding: MediaQuery.of(context).padding (lib/src/terminal_view.dart ~line 230), injecting safe-area insets even when not desired.
• On Android/iOS this pushes terminal content down/right (logs start below a blank strip); macOS is unaffected because padding is zero.
• Expected: terminal content should start at the widget’s top-left unless callers opt into safe-area handling.
• Proposed fix: default to caller-controlled padding (e.g., widget.padding ?? EdgeInsets.zero) and let consumers wrap with SafeArea/MediaQuery.removePadding when needed.