Add delay/reverb dry-wet, granular randomize toggles, rework accent DSP

- Add delay and reverb Dry/Wet parameters and knobs, wired into presets
- Add Accent/Slide/Fine/Rate toggles to the Randomize panel with new
  per-aspect pattern randomizers
- Soften accent: modest volume lift plus small cutoff and filter-attack
  modulation instead of the heavy 5x gain boost
- Halve reverb comb/allpass delays so the wet speaks sooner
- Regenerate a fresh build stamp on every build

Source/BuildInfo.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <JuceHeader.h>
+#include "BuildStamp.h"
 
 namespace monostep
 {
@@ -19,6 +20,9 @@ inline juce::String gitInfo()
 
 inline juce::String buildDateString()
 {
+#if defined (MONOSTEP_BUILD_DATE)
+    return juce::String (MONOSTEP_BUILD_DATE);
+#else
     static const char* months[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
                                     "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
 
@@ -36,6 +40,7 @@ inline juce::String buildDateString()
     const int year = d.substring (7).getIntValue();
 
     return juce::String::formatted ("%04d-%02d-%02d__%s", year, month, day, __TIME__);
+#endif
 }
 
 inline juce::String footerText()