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/VuMeter.h

@@ -0,0 +1,47 @@
+#pragma once
+#include <JuceHeader.h>
+
+class VuMeter : public juce::Component
+{
+public:
+    void setLevel (float left, float right)
+    {
+        levelL = left;
+        levelR = right;
+        repaint();
+    }
+
+    void paint (juce::Graphics& g) override
+    {
+        auto bounds = getLocalBounds().toFloat().reduced (1);
+        float halfW = bounds.getWidth() / 2.0f - 1;
+        auto leftBar  = bounds.removeFromLeft (halfW);
+        bounds.removeFromLeft (2);
+        auto rightBar = bounds;
+
+        drawBar (g, leftBar, levelL);
+        drawBar (g, rightBar, levelR);
+    }
+
+private:
+    float levelL = 0.0f, levelR = 0.0f;
+
+    void drawBar (juce::Graphics& g, juce::Rectangle<float> bar, float level)
+    {
+        g.setColour (juce::Colour (0xff222233));
+        g.fillRoundedRectangle (bar, 2.0f);
+
+        float h = bar.getHeight() * juce::jlimit (0.0f, 1.0f, level);
+        auto filled = bar.removeFromBottom (h);
+
+        // Green -> Yellow -> Red gradient
+        if (level < 0.6f)
+            g.setColour (juce::Colour (0xff00cc44));
+        else if (level < 0.85f)
+            g.setColour (juce::Colour (0xffcccc00));
+        else
+            g.setColour (juce::Colour (0xffff3333));
+
+        g.fillRoundedRectangle (filled, 2.0f);
+    }
+};