Cleanup: reorganize doxygen modules

- Nest compositor pages under the compositor module
- Nest GUI, DNA/RNA & externformats modules under Blender.
- Remove modules from intern which no longer exist.
- Add intern modules (atomic, eigen, glew-mx, libc_compat, locale,
  numaapi, rigidbody, sky, utfconv).
- Use 'intern_' prefix for intern modules since some of the modules
  use generic terms such as locale & atomic.

intern/eigen/eigen_capi.h

@@ -17,6 +17,10 @@
  * All rights reserved.
  */
 
+/** \file
+ * \ingroup intern_eigen
+ */
+
 #ifndef __EIGEN_C_API_H__
 #define __EIGEN_C_API_H__
 

intern/eigen/intern/eigenvalues.h

@@ -17,6 +17,10 @@
  * All rights reserved.
  */
 
+/** \file
+ * \ingroup intern_eigen
+ */
+
 #ifndef __EIGEN3_EIGENVALUES_C_API_H__
 #define __EIGEN3_EIGENVALUES_C_API_H__
 

intern/eigen/intern/linear_solver.cc

@@ -22,6 +22,10 @@
  *  and the reason for such modification.
  */
 
+/** \file
+ * \ingroup intern_eigen
+ */
+
 #include "linear_solver.h"
 
 #include <Eigen/Sparse>

intern/eigen/intern/linear_solver.h

@@ -22,6 +22,10 @@
  *  and the reason for such modification.
  */
 
+/** \file
+ * \ingroup intern_eigen
+ */
+
 #pragma once
 
 #include <stdbool.h>

intern/eigen/intern/matrix.cc

@@ -17,6 +17,10 @@
  * All rights reserved.
  */
 
+/** \file
+ * \ingroup intern_eigen
+ */
+
 #ifndef __EIGEN3_MATRIX_C_API_CC__
 #define __EIGEN3_MATRIX_C_API_CC__
 

intern/eigen/intern/matrix.h

@@ -17,6 +17,10 @@
  * All rights reserved.
  */
 
+/** \file
+ * \ingroup intern_eigen
+ */
+
 #ifndef __EIGEN3_MATRIX_C_API_H__
 #define __EIGEN3_MATRIX_C_API_H__
 

intern/eigen/intern/svd.cc

@@ -17,6 +17,10 @@
  * All rights reserved.
  */
 
+/** \file
+ * \ingroup intern_eigen
+ */
+
 #ifndef __EIGEN3_SVD_C_API_CC__
 #define __EIGEN3_SVD_C_API_CC__
 

intern/eigen/intern/svd.h

@@ -17,6 +17,10 @@
  * All rights reserved.
  */
 
+/** \file
+ * \ingroup intern_eigen
+ */
+
 #ifndef __EIGEN3_SVD_C_API_H__
 #define __EIGEN3_SVD_C_API_H__