term.ui: native Windows console implementation (#8359)

vlib/term/ui/consoleapi_windows.c.v

@@ -0,0 +1,84 @@
+module ui
+
+import os
+
+union C.Event {
+	KeyEvent              C.KEY_EVENT_RECORD
+	MouseEvent            C.MOUSE_EVENT_RECORD
+	WindowBufferSizeEvent C.WINDOW_BUFFER_SIZE_RECORD
+	MenuEvent             C.MENU_EVENT_RECORD
+	FocusEvent            C.FOCUS_EVENT_RECORD
+}
+
+[typedef]
+struct C.INPUT_RECORD {
+	EventType u16
+	Event     C.Event
+}
+
+union C.uChar {
+	UnicodeChar rune
+	AsciiChar   byte
+}
+
+[typedef]
+struct C.KEY_EVENT_RECORD {
+	bKeyDown          int
+	wRepeatCount      u16
+	wVirtualKeyCode   u16
+	wVirtualScanCode  u16
+	uChar             C.uChar
+	dwControlKeyState u32
+}
+
+[typedef]
+struct C.MOUSE_EVENT_RECORD {
+	dwMousePosition   C.COORD
+	dwButtonState     u32
+	dwControlKeyState u32
+	dwEventFlags      u32
+}
+
+[typedef]
+struct C.WINDOW_BUFFER_SIZE_RECORD {
+	dwSize C.COORD
+}
+
+[typedef]
+struct C.MENU_EVENT_RECORD {
+	dwCommandId u32
+}
+
+[typedef]
+struct C.FOCUS_EVENT_RECORD {
+	bSetFocus int
+}
+
+[typedef]
+struct C.COORD {
+	X i16
+	Y i16
+}
+
+[typedef]
+struct C.SMALL_RECT {
+	Left   u16
+	Top    u16
+	Right  u16
+	Bottom u16
+}
+
+[typedef]
+struct C.CONSOLE_SCREEN_BUFFER_INFO {
+	dwSize              C.COORD
+	dwCursorPosition    C.COORD
+	wAttributes         u16
+	srWindow            C.SMALL_RECT
+	dwMaximumWindowSize C.COORD
+}
+
+fn C.ReadConsoleInput() bool
+
+fn C.GetNumberOfConsoleInputEvents() bool
+
+fn C.GetConsoleScreenBufferInfo(handle os.HANDLE, info &C.CONSOLE_SCREEN_BUFFER_INFO) bool