Cleanup: Rename BKE_library_idmap file to BKE_main_idmap

Part of T72604:
> Proposal: BKE_library and BKE_main API naming: prefixes conventions

source/blender/blenkernel/BKE_main_idmap.h

@@ -13,8 +13,8 @@
  * along with this program; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
-#ifndef __BKE_LIBRARY_IDMAP_H__
-#define __BKE_LIBRARY_IDMAP_H__
+#ifndef __BKE_MAIN_IDMAP_H__
+#define __BKE_MAIN_IDMAP_H__
 
 /** \file
  * \ingroup bke
@@ -42,4 +42,4 @@ struct ID *BKE_main_idmap_lookup_id(struct IDNameLib_Map *id_typemap,
                                     const struct ID *id) ATTR_WARN_UNUSED_RESULT
     ATTR_NONNULL(1, 2);
 
-#endif /* __BKE_LIBRARY_IDMAP_H__ */
+#endif /* __BKE_MAIN_IDMAP_H__ */

source/blender/blenkernel/CMakeLists.txt

@@ -136,7 +136,6 @@ set(SRC
   intern/layer.c
   intern/layer_utils.c
   intern/library.c
-  intern/library_idmap.c
   intern/library_override.c
   intern/library_query.c
   intern/library_remap.c
@@ -144,6 +143,7 @@ set(SRC
   intern/lightprobe.c
   intern/linestyle.c
   intern/main.c
+  intern/main_idmap.c
   intern/mask.c
   intern/mask_evaluate.c
   intern/mask_rasterize.c
@@ -299,7 +299,6 @@ set(SRC
   BKE_lattice.h
   BKE_layer.h
   BKE_library.h
-  BKE_library_idmap.h
   BKE_library_override.h
   BKE_library_query.h
   BKE_library_remap.h
@@ -307,6 +306,7 @@ set(SRC
   BKE_lightprobe.h
   BKE_linestyle.h
   BKE_main.h
+  BKE_main_idmap.h
   BKE_mask.h
   BKE_material.h
   BKE_mball.h

source/blender/blenkernel/intern/main_idmap.c

@@ -26,8 +26,8 @@
 #include "DNA_ID.h"
 
 #include "BKE_idcode.h"
-#include "BKE_library_idmap.h" /* own include */
 #include "BKE_main.h"
+#include "BKE_main_idmap.h" /* own include */
 
 /** \file
  * \ingroup bke

source/blender/blenloader/intern/readfile.c

@@ -121,7 +121,7 @@
 #include "BKE_idprop.h"
 #include "BKE_layer.h"
 #include "BKE_library.h"
-#include "BKE_library_idmap.h"
+#include "BKE_main_idmap.h"
 #include "BKE_library_override.h"
 #include "BKE_library_query.h"
 #include "BKE_main.h"  // for Main