Added two simple tooling Primitives for easy/common cases

Added three simple tooling Primitives:

(1) SingleLinePrimitive2D:
Just a Line from Point A to B with a BColor, decomposes
to a PolygonHairlinePrimitive2D (and to a PointArrayPrimitive2D
if only a single point aka A == B)

(2) LineRectanglePrimitive2D:
(3) FilledRectanglePrimitive2D:
Rectangles that support fill or line, gets decomposed
to maybe PolyPolygonColorPrimitive2D (if filled) and a
PolygonHairlinePrimitive2D (if line) or nothing if the
B2DRange is empty

NOTE: If using these despite being hor/ver aligned due to
their nature as B2DRange(s) (aka 'non rotated/sheared')
these may have to be transformed if the current
transformation context you are working in is rotated
or sheared, so *ensure* to handle these correctly if
you do handle them yourself. This is not needed with
the Polygon-based ones - that's why these are - and
stay - the common case(s).

Both are hairline primitives themselves, so are potentially
*view-dependent* (see comment in *.cxx and *.hxx). They will be
useful as very simple primitives for small renderers, e.g. to
avoid conversion from rectangles or just lines to polygons.

The more general Primitives are always the polygon-based ones,
so these new ones get decomposed to these (decomposition direction,
complex -> simpler). This assures that a processor/renderer has
minimally to support the polygon-based ones, but *can* use these
simple tooling ones directly if he wants to.

This will come in handy for future System-Dependent PrimitiveRenderers,
which I am currently working on one to offer as example - this leads
to identifying helpful upstream things that will come in handy in that
regard - like these ones.

Change-Id: Ie5039e6cfad6c9914c165cae6f8b59abecc38302
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/144543
Tested-by: Jenkins
Reviewed-by: Armin Le Grand <Armin.Le.Grand@me.com>

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