Remove custom bundler scripts and rebundle with latest fyne bundle (#…

…1898)

This removes the `gen.go` custom bundle scripts that were used in `cmd/fyne_demo` and `cmd/fyne_demo` in favour of using `go:generate` in combination with `fyne bundle`.
The only remaining custom bundle script is the one in the theme package, but that requires a lot more work due to the fonts combined with the ammount of icons.

cmd/fyne_demo/data/icons.go

@@ -1,5 +1,7 @@
 package data
 
+//go:generate fyne bundle -package data -o bundled.go assets
+
 import (
 	"fyne.io/fyne/v2"
 	"fyne.io/fyne/v2/theme"
@@ -38,4 +40,4 @@ func NewThemedResource(dark, light fyne.Resource) *ThemedResource {
 }
 
 // FyneScene contains the full fyne logo with background design
-var FyneScene = NewThemedResource(fynescenedark, fynescenelight)
+var FyneScene = NewThemedResource(resourceFynescenedarkPng, resourceFynescenelightPng)

cmd/fyne_settings/data/data.go

@@ -0,0 +1,4 @@
+package data
+
+// TODO: Bundle the folder instead of the file when we have language support.
+//go:generate fyne bundle -package settings -o ../settings/bundled.go assets/appearance.svg

cmd/fyne_settings/settings/appearance.go

@@ -42,7 +42,7 @@ func NewSettings() *Settings {
 
 // AppearanceIcon returns the icon for appearance settings
 func (s *Settings) AppearanceIcon() fyne.Resource {
-	return theme.NewThemedResource(appearanceIcon)
+	return theme.NewThemedResource(resourceAppearanceSvg)
 }
 
 // LoadAppearanceScreen creates a new settings screen to handle appearance configuration