Add test for the Roboto "texte coupé" bug (now fixed)

[tinchodias]

Add test the "texte coupé" bug reported by @ELePors and @labordep
This probably implies adding Roboto font as downloadable.

This showed the bug:

aString := 'RAD'.
fontSize := 14.
ttfFileReference := '../fonts/Roboto/Roboto-Regular.ttf' asFileReference.

aeCanvas := AeCanvas extent: 100 @ 100.
aeCanvas clear: Color white.

ftLibrary := AeFTLibrary newInitialized.
ftFace := ftLibrary newFaceFromFile: ttfFileReference index: 0.
cairoScaledFont := aeCanvas scaledFontForFace: ftFace size: fontSize.
cairoGlyphsArray := cairoScaledFont glyphArrayForString: aString.

metrics :=
	aeCanvas
		metricsFor: cairoGlyphsArray
		font: cairoScaledFont.

aeCanvas privateAeCairoContext
	translateByX: 10 y: 10;
	rectangleTo: metrics width @ metrics height;
	clip;
	sourceColor: Color yellow;
	paint.

aeCanvas
	setSourceColor: Color black;
	pathTranslate: metrics bearingX negated @ metrics bearingY negated;
	drawGlyphs: cairoGlyphsArray font: cairoScaledFont.

aeCanvas inspect.
aeCanvas writePngTo: '/tmp/a.png' asFileReference 

[tinchodias]

This: pharo-graphics/Bloc#730

[tinchodias]

There is a 3MB zip, from 2017, at: https://github.com/googlefonts/roboto-2/releases/tag/v2.138
That repository is archived and links to the new repository with a variable font... 27MB: https://github.com/googlefonts/roboto-3-classic

There may be a more minimalistic hinted font that showed the bug, to replace Roboto.