Plugin client updates

[kunitoki]

This PR aims at:

• add support to AUv2 plugins
• add support for offline processing in AudioProcessor
• add support for PlayHead in plugin clients and hosted plugins
• 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
• fixed initialisation of plugins gui in all supported formats
• integration of SMTG (VST3), auval (AU), clap-validator (CLAP) and pluginval (VST3-AU) in each plugin client target

[codecov]

Codecov Report

❌ Patch coverage is 73.11111% with 121 lines in your changes missing coverage. Please review.
✅ Project coverage is 77.06%. Comparing base (186fd60) to head (e0060fe).

Files with missing lines	Patch %	Lines
modules/yup_gui/dialogs/yup_FileChooser.cpp	0.00%	46 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 ⚠️
modules/yup_gui/component/yup_ComponentNative.cpp	0.00%	5 Missing ⚠️
...p_audio_processors/processors/yup_AudioProcessor.h	80.00%	4 Missing ⚠️
...rocessors/processors/yup_AudioParameterBuilder.cpp	96.29%	2 Missing ⚠️
...audio_processors/processors/yup_AudioProcessor.cpp	88.23%	2 Missing ⚠️
..._processors/processors/yup_ParameterChangeBuffer.h	92.00%	2 Missing ⚠️
modules/yup_gui/widgets/yup_Slider.cpp	0.00%	2 Missing ⚠️
...audio_processors/processors/yup_AudioParameter.cpp	91.66%	1 Missing ⚠️
... and 2 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #106      +/-   ##
==========================================
+ Coverage   75.81%   77.06%   +1.25%     
==========================================
  Files         602      601       -1     
  Lines       60841    60107     -734     
==========================================
+ Hits        46125    46321     +196     
+ Misses      14716    13786     -930     

Files with missing lines	Coverage Δ
...p_audio_basics/audio_play_head/yup_AudioPlayHead.h	89.11% <ø> (ø)
.../yup_audio_graph/graph/yup_AudioGraphProcessor.cpp	94.78% <100.00%> (+0.01%)	⬆️
...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)
modules/yup_core/system/yup_PlatformDefs.h	100.00% <ø> (ø)
modules/yup_core/threads/yup_WaitableEvent.cpp	100.00% <100.00%> (ø)
modules/yup_events/messages/yup_MessageManager.cpp	53.07% <ø> (ø)
modules/yup_events/timers/yup_Timer.cpp	71.42% <100.00%> (ø)
... and 27 more

... and 4 files with indirect coverage changes

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