Unify struct names and tags

src/os/shell/termcolour/win/termcolour_win.c

@@ -13,8 +13,8 @@
 #define WIN32_LEAN_AND_MEAN
 #include <Windows.h>
 
-typedef struct termcolour_data TermcolourData;
-struct termcolour_data {
+typedef struct TermcolourData TermcolourData;
+struct TermcolourData {
 	HANDLE handle;
 	WORD   default_colour;
 	WORD   current_colour;