chore: fix compatibility with CLion (#12)

## Summary

I love this IDE and I need to figure out how to make it work for JUCE
projects.

## Changelog

```
- Add specific header includes for project header files
```

src/RotorAnalyzer.h

@@ -10,7 +10,11 @@
 
 #pragma once
 
-#include "JuceHeader.h"
+#include <juce_audio_basics/juce_audio_basics.h>
+#include <juce_dsp/juce_dsp.h>
+#include <juce_gui_basics/juce_gui_basics.h>
+
+using namespace juce;
 
 //==============================================================================
 /*

src/RotorEditor.h

@@ -10,12 +10,15 @@
 
 #pragma once
 
-#include "JuceHeader.h"
-
 #include "RotorAnalyzer.h"
 #include "RotorLookAndFeel.h"
 #include "RotorProcessor.h"
 
+#include <juce_audio_processors/juce_audio_processors.h>
+#include <juce_opengl/juce_opengl.h>
+
+using namespace juce;
+
 typedef AudioProcessorValueTreeState::SliderAttachment SliderAttachment;
 typedef AudioProcessorValueTreeState::ButtonAttachment ButtonAttachment;
 

src/RotorLookAndFeel.h

@@ -10,10 +10,12 @@
 
 #pragma once
 
-#include "JuceHeader.h"
-
 #include "RotorData.h"
 
+#include <juce_gui_basics/juce_gui_basics.h>
+
+using namespace juce;
+
 //==============================================================================
 class RotorLookAndFeel : public LookAndFeel_V4 {
 public:

src/RotorProcessor.h

@@ -7,7 +7,9 @@
 
 #pragma once
 
-#include "JuceHeader.h"
+#include <juce_audio_processors/juce_audio_processors.h>
+
+using namespace juce;
 
 //==============================================================================
 /**