Plugin client updates

[kunitoki]

This PR aims at:

• add support to AUv2 plugins
• add support for offline processing in AudioProcessor
• introduce the new AudioProcessor change which prepares the ground for the streamline of audio/spectral processing RFC:

- void AudioProcessor::processBlock (AudioBuffer<float>& audioBuffer, MidiBuffer& midiBuffer)
+ void AudioProcessor::processBlock (AudioProcessContext<float>& context)

• add support for per block sample accurate parameter changes, via ParameterChangeBuffer
• improved gestures handling together when automation is also involved

[codecov]

Codecov Report

❌ Patch coverage is 43.40836% with 176 lines in your changes missing coverage. Please review.
✅ Project coverage is 75.17%. Comparing base (2ae4d72) to head (98e8482).

Files with missing lines	Patch %	Lines
modules/yup_gui/native/yup_Windowing_sdl2.cpp	0.00%	91 Missing ⚠️
modules/yup_gui/menus/yup_PopupMenu.cpp	61.95%	35 Missing ⚠️
...ules/yup_gui/themes/theme_v1/yup_ThemeVersion1.cpp	41.17%	20 Missing ⚠️
...audio_processors/processors/yup_AudioParameter.cpp	21.42%	11 Missing ⚠️
modules/yup_gui/component/yup_ComponentNative.cpp	0.00%	5 Missing ⚠️
modules/yup_gui/themes/yup_ApplicationTheme.cpp	66.66%	5 Missing ⚠️
...p_audio_processors/processors/yup_AudioProcessor.h	0.00%	4 Missing ⚠️
...audio_processors/processors/yup_AudioProcessor.cpp	81.25%	3 Missing ⚠️
modules/yup_gui/widgets/yup_Slider.cpp	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #106      +/-   ##
==========================================
- Coverage   75.29%   75.17%   -0.13%     
==========================================
  Files         597      597              
  Lines       60462    60661     +199     
==========================================
+ Hits        45527    45600      +73     
- Misses      14935    15061     +126     

Files with missing lines	Coverage Δ
.../yup_audio_graph/graph/yup_AudioGraphProcessor.cpp	94.81% <100.00%> (+0.04%)	⬆️
...es/yup_audio_graph/graph/yup_AudioGraphProcessor.h	0.00% <ø> (ø)
...audio_plugin_host/host/yup_AudioPluginInstance.cpp	87.50% <100.00%> (-0.60%)	⬇️
...p_audio_plugin_host/host/yup_AudioPluginInstance.h	66.66% <ø> (ø)
...p_audio_processors/processors/yup_AudioParameter.h	100.00% <100.00%> (ø)
...rocessors/processors/yup_AudioParameterBuilder.cpp	67.50% <100.00%> (+4.64%)	⬆️
..._processors/processors/yup_AudioParameterBuilder.h	100.00% <ø> (ø)
modules/yup_gui/component/yup_Component.cpp	65.34% <100.00%> (+0.12%)	⬆️
modules/yup_gui/component/yup_Component.h	76.00% <ø> (ø)
modules/yup_gui/component/yup_ComponentNative.h	0.00% <ø> (ø)
... and 14 more

... and 2 files with indirect coverage changes

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