Shadows on forward renderer

[ada-tv]

• Shadow pass running before doing forward (and passing the shadow frame to the deferred transparent pass)
• Shadows rendering (currently reuses the fade params buffer slot)
• Invalid pipeline pointer crash
• The rest of the shaders (simple, voxel, etc, model is the prototyping shader since it's the most commonly used one)
• Figure out what to do with the forward-only ifdef for Android in RenderViewTask
• Update the settings QML to make the shadow toggle visible on both deferred and forward
• Fix broken resolution scale setting on forward
• Fix mirrors using deferred instead of forward
• Figure out why opaque forward simple doesn't receive shadows but transparent does (maybe something with instancing?)

[ada-tv]

weird crash that only sometimes happens when shadows are enabled

Thread 55 "RenderThread" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ffeb67fc6c0 (LWP 123354)]
gpu::Batch::setPipeline (this=0x7ffea07ace70, 
    pipeline=<error reading variable: Cannot access memory at address 0x8>)
    at /home/ada/src/overte/libraries/gpu/src/gpu/Batch.cpp:400
400	    _currentPipeline = pipeline;
(gdb) bt
#0  gpu::Batch::setPipeline
    (this=0x7ffea07ace70, pipeline=<error reading variable: Cannot access memory at address 0x8>) at /home/ada/src/overte/libraries/gpu/src/gpu/Batch.cpp:400
#1  0x00007ffff58a0412 in render::ShapePlumber::pickPipeline
    (this=<optimized out>, args=0x7ffeb67fb090, key=<optimized out>)
    at /home/ada/src/overte/libraries/render/src/render/ShapePipeline.cpp:166
#2  0x00007ffff58a06c1 in render::ShapePlumber::pickPipeline
    (this=0x5555797d3080, args=args@entry=0x7ffeb67fb090, key=...)
    at /home/ada/src/overte/libraries/render/src/render/ShapePipeline.cpp:153
#3  0x00007ffff586ae9d in renderShape
    (args=args@entry=0x7ffeb67fb090, shapeContext=std::shared_ptr<render::ShapePlumber> (use count 4145, weak count 0) = {...}, item=..., globalKey=...)
    at /usr/include/c++/16/bits/shared_ptr_base.h:1751
#4  0x00007ffff586b1cc in render::renderShapes
    (renderContext=std::shared_ptr<render::RenderContext> (use count 1, weak count 0) = {...}, shapeContext=std::shared_ptr<render::ShapePlumber> (use count 4145, weak count 0) = {...}, inItems=std::vector of length 1, capacity 1 = {...}, maxDrawnItems=maxDrawnItems@entry=-1, globalKey=...)
    at /home/ada/src/overte/libraries/render/src/render/DrawTask.cpp:83
#5  0x00007ffff61a240c in sortAndRenderZPassShapes
    (shapePlumber=<optimized out>, renderContext=<optimized out>, inShapes=std::unordered_map with 7 elements = {...}, itemBounds=std::vector of length 4, capacity 4 = {...})
    at /home/ada/src/overte/build/libraries/render-utils/src/RenderPipelinesInit.cpp:2037
#6  0x00007ffff613e46c in operator() (__closure=0x7ffea10f6170, batch=...)
    at /home/ada/src/overte/libraries/render-utils/src/RenderShadowTask.cpp:255
#7  std::__invoke_impl<void, RenderShadowMap::run(const render::RenderContextPointer&, const Inputs&)::<lambda(gpu::Batch&)>&, gpu::Batch&> (__f=...)
    at /usr/include/c++/16/bits/invoke.h:63
#8  std::__invoke_r<void, RenderShadowMap::run(const render::RenderContextPointer&, const Inputs&)::<lambda(gpu::Batch&)>&, gpu::Batch&> (__fn=...)
    at /usr/include/c++/16/bits/invoke.h:113
#9  std::_Function_handler<void(gpu::Batch&), RenderShadowMap::run(const render::RenderContextPointer&, const Inputs&)::<lambda(gpu::Batch&)> >::_M_invoke(const std::_Any_data &, gpu::Batch &) (__functor=<optimized out>, __args#0=...)
    at /usr/include/c++/16/bits/std_function.h:295
#10 0x00007ffff475e81a in std::function<void(gpu::Batch&)>::operator()
    (this=0x7ffeb67fa1b0, __args#0=<optimized out>)
    at /usr/include/c++/16/bits/std_function.h:581
#11 gpu::doInBatch
    (name=name@entry=0x7ffff61aaf60 "RenderShadowMap::run", context=std::shared_ptr<gpu::Context> (use count 7, weak count 0) = {...}, f=...)
    at /home/ada/src/overte/libraries/gpu/src/gpu/Context.cpp:367
#12 0x00007ffff6140cf2 in RenderShadowMap::run
    (this=0x555583c52860, renderContext=std::shared_ptr<render::RenderContext> (use count 1, weak count 0) = {...}, inputs=<optimized out>)
    at /home/ada/src/overte/libraries/render-utils/src/RenderShadowTask.cpp:234