GTK3: Updated lazcairo1 binding unit.

We used Bookworm (Debian 12.2) GIR files constrained the units version
to Bullseye (Debian 11.6) shipped libraries.

They were generated using the following command:
```sh
gir2pas -P Laz -e Set -w \
        -M atk-2.36 \
        -M pango-1.16 \
        -M pangocairo-1.46 \
        -M glib-2.66 \
        -M gio-2.66 \
        -M gmodule-2.66 \
        -M gobject-2.66 \
        -M gtk-3.24 \
        -i /usr/share/gir-1.0/PangoCairo-1.0.gir \
        -o lazarus/lcl/interfaces/gtk3/gtk3bindings
```

Some code was manually added at the end of the interface section to keep
backward compatibility with old, manually translated unit.

lcl/interfaces/gtk3/gtk3bindings/lazcairo1.pas

@@ -286,32 +286,32 @@ type
 type
 
 
-  { TCairoContext }
+  { Tcairo_t }
-  PPCairoContext = ^PCairoContext;
+  PPcairo_t = ^Pcairo_t;
-  PCairoContext = ^TCairoContext;
+  Pcairo_t = ^Tcairo_t;
-  TCairoContext = object
+  Tcairo_t = object
   end;
 
 
-  { TCairoDevice }
+  { Tcairo_device_t }
-  PPCairoDevice = ^PCairoDevice;
+  PPcairo_device_t = ^Pcairo_device_t;
-  PCairoDevice = ^TCairoDevice;
+  Pcairo_device_t = ^Tcairo_device_t;
-  TCairoDevice = object
+  Tcairo_device_t = object
   end;
 
 
-  { TCairoSurface }
+  { Tcairo_surface_t }
-  PPCairoSurface = ^PCairoSurface;
+  PPcairo_surface_t = ^Pcairo_surface_t;
-  PCairoSurface = ^TCairoSurface;
+  Pcairo_surface_t = ^Tcairo_surface_t;
-  TCairoSurface = object
+  Tcairo_surface_t = object
   end;
 
 
-  { TcairoMatrix }
+  { Tcairo_matrix_t }
-  PPcairoMatrix = ^PcairoMatrix;
+  PPcairo_matrix_t = ^Pcairo_matrix_t;
-  PcairoMatrix = ^TcairoMatrix;
+  Pcairo_matrix_t = ^Tcairo_matrix_t;
 
-  TcairoMatrix = record
+  Tcairo_matrix_t = record
     xx : Double;
     yx : Double;
     xy : Double;
@@ -323,17 +323,17 @@ type
 
 
 
-  { TCairoPattern }
+  { Tcairo_pattern_t }
-  PPCairoPattern = ^PCairoPattern;
+  PPcairo_pattern_t = ^Pcairo_pattern_t;
-  PCairoPattern = ^TCairoPattern;
+  Pcairo_pattern_t = ^Tcairo_pattern_t;
-  TCairoPattern = object
+  Tcairo_pattern_t = object
   end;
 
 
-  { TCairoRegion }
+  { Tcairo_region_t }
-  PPCairoRegion = ^PCairoRegion;
+  PPcairo_region_t = ^Pcairo_region_t;
-  PCairoRegion = ^TCairoRegion;
+  Pcairo_region_t = ^Tcairo_region_t;
-  TCairoRegion = object
+  Tcairo_region_t = object
   end;
 
 
@@ -402,10 +402,10 @@ type
   Pcairo_hint_metrics_t = ^Tcairo_hint_metrics_t;
 
 
-  { TCairoFontOptions }
+  { Tcairo_font_options_t }
-  PPCairoFontOptions = ^PCairoFontOptions;
+  PPcairo_font_options_t = ^Pcairo_font_options_t;
-  PCairoFontOptions = ^TCairoFontOptions;
+  Pcairo_font_options_t = ^Tcairo_font_options_t;
-  TCairoFontOptions = object
+  Tcairo_font_options_t = object
   end;
 
 
@@ -454,38 +454,38 @@ type
   Pcairo_region_overlap_t = ^Tcairo_region_overlap_t;
 
 
-  { TCairoFontFace }
+  { Tcairo_font_face_t }
-  PPCairoFontFace = ^PCairoFontFace;
+  PPcairo_font_face_t = ^Pcairo_font_face_t;
-  PCairoFontFace = ^TCairoFontFace;
+  Pcairo_font_face_t = ^Tcairo_font_face_t;
-  TCairoFontFace = object
+  Tcairo_font_face_t = object
   end;
 
 
-  { TCairoScaledFont }
+  { Tcairo_scaled_font_t }
-  PPCairoScaledFont = ^PCairoScaledFont;
+  PPcairo_scaled_font_t = ^Pcairo_scaled_font_t;
-  PCairoScaledFont = ^TCairoScaledFont;
+  Pcairo_scaled_font_t = ^Tcairo_scaled_font_t;
-  TCairoScaledFont = object
+  Tcairo_scaled_font_t = object
   end;
 
 
-  { TcairoPath }
+  { Tcairo_path_t }
-  PPcairoPath = ^PcairoPath;
+  PPcairo_path_t = ^Pcairo_path_t;
-  PcairoPath = ^TcairoPath;
+  Pcairo_path_t = ^Tcairo_path_t;
 
-  TcairoPath = record
+  Tcairo_path_t = record
   end;
 
 
 
 
-  { TCairoRectangle }
+  { Tcairo_rectangle_t }
-  PPCairoRectangle = ^PCairoRectangle;
+  PPcairo_rectangle_t = ^Pcairo_rectangle_t;
-  PCairoRectangle = ^TCairoRectangle;
+  Pcairo_rectangle_t = ^Tcairo_rectangle_t;
 
 
   { cdouble }
   Pcdouble = ^cdouble;
-  TCairoRectangle = object
+  Tcairo_rectangle_t = object
     x: cdouble;
     y: cdouble;
     width: cdouble;
@@ -493,18 +493,18 @@ type
   end;
 
 
-  { TCairoRectangleInt }
+  { Tcairo_rectangle_int_t }
-  PPCairoRectangleInt = ^PCairoRectangleInt;
+  PPcairo_rectangle_int_t = ^Pcairo_rectangle_int_t;
-  PCairoRectangleInt = ^TCairoRectangleInt;
+  Pcairo_rectangle_int_t = ^Tcairo_rectangle_int_t;
 
 
-  { cint32 }
+  { cint }
-  Pcint32 = ^cint32;
+  Pcint = ^cint;
-  TCairoRectangleInt = object
+  Tcairo_rectangle_int_t = object
-    x: cint32;
+    x: cint;
-    y: cint32;
+    y: cint;
-    width: cint32;
+    width: cint;
-    height: cint32;
+    height: cint;
   end;
 
 function cairo_gobject_context_get_type: csize_t { TGType }; cdecl; external Lazcairo1_library name 'cairo_gobject_context_get_type';
@@ -528,34 +528,6 @@ procedure cairo_image_surface_create; cdecl; external Lazcairo1_library name 'ca
 const
   LIB_CAIRO = Lazcairo1_library;
 
-type
-  PPcairo_rectangle_int_t = PPCairoRectangleInt;
-  PPcairo_surface_t = PPCairoSurface;
-
-  Pcairo_t = PCairoContext;
-  Pcairo_device_t = PCairoDevice;
-  Pcairo_font_face_t = PCairoFontFace;
-  Pcairo_font_options_t = PCairoFontOptions;
-  Pcairo_matrix_t = PCairoMatrix;
-  Pcairo_pattern_t = PCairoPattern;
-  Pcairo_path_t = PCairoPath;
-  Pcairo_rectangle_int_t = PCairoRectangleInt;
-  Pcairo_region_t = PCairoRegion;
-  Pcairo_scaled_font_t = PCairoScaledFont;
-  Pcairo_surface_t = PCairoSurface;
-
-  Tcairo_t = TCairoContext;
-  Tcairo_device_t = TCairoDevice;
-  Tcairo_font_face_t = TCairoFontFace;
-  Tcairo_font_options_t = TCairoFontOptions;
-  Tcairo_matrix_t = TCairoMatrix;
-  Tcairo_pattern_t = TCairoPattern;
-  Tcairo_path_t = TCairoPath;
-  Tcairo_rectangle_int_t = TCairoRectangleInt;
-  Tcairo_region_t = TCairoRegion;
-  Tcairo_scaled_font_t = TCairoScaledFont;
-  Tcairo_surface_t = TCairoSurface;
-
 function cairo_version: LongInt; cdecl; external LIB_CAIRO;
 function cairo_version_string: PChar; cdecl; external LIB_CAIRO;
 //Helper function to retrieve decoded version