Initial commit: InstaDrums VST3 drum sampler plugin

- 12-pad drum sampler with 4x3 grid (expandable by 4)
- Velocity layers with round-robin (Salamander-style filename parsing)
- Rhythm Engine-style GUI: pad grid (left), sample editor (right top),
  FX panel (right bottom), master panel (bottom)
- Waveform thumbnails on pads + large waveform in sample editor
- ADSR envelope, pitch, pan per pad
- Drag & drop sample/folder loading
- Kit save/load (.drumkit XML presets)
- Load Folder with smart name matching (kick, snare, hihat, etc.)
- Choke groups, one-shot/polyphonic mode
- Dark modern LookAndFeel with neon accent colors
- Built with JUCE framework, CMake, MSVC 2022

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Source/WaveformDisplay.h

@@ -0,0 +1,26 @@
+#pragma once
+#include <JuceHeader.h>
+
+class WaveformDisplay : public juce::Component
+{
+public:
+    WaveformDisplay();
+
+    void setBuffer (const juce::AudioBuffer<float>* buffer, double sampleRate = 44100.0);
+    void setColour (juce::Colour c) { waveColour = c; repaint(); }
+    void setStartEnd (float start, float end) { startPos = start; endPos = end; repaint(); }
+    void setADSR (float a, float d, float s, float r) { adsrA = a; adsrD = d; adsrS = s; adsrR = r; repaint(); }
+    void setShowADSR (bool show) { showADSR = show; repaint(); }
+
+    void paint (juce::Graphics& g) override;
+
+private:
+    const juce::AudioBuffer<float>* audioBuffer = nullptr;
+    double bufferSampleRate = 44100.0;
+    juce::Colour waveColour { 0xffff8844 };
+    float startPos = 0.0f, endPos = 1.0f;
+    float adsrA = 0.001f, adsrD = 0.1f, adsrS = 1.0f, adsrR = 0.05f;
+    bool showADSR = false;
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (WaveformDisplay)
+};