Add option to limit rendering to Tiny PS

[M66B]

For BIMI and possibly other security related use cases it is necessary to limit SVG rendering to base profile "Tiny PS", please see here for the relevant standard.

For an intermediate solution, there could be a new method SVG.getBaseProfile(), so callers can check the SVG profile before requesting rendering the parsed SVG. For security reasons it would of course be better to actually check the profile during rendering.