Refactor translation code out of blenfont

- Add blentranslation `BLT_*` module.
- moved & split `BLF_translation.h` into (`BLT_translation.h`, `BLT_lang.h`).
- moved `BLF_*_unifont` functions from `blf_translation.c` to new source file `blf_font_i18n.c`.

source/blender/render/intern/source/convertblender.c

@@ -44,7 +44,7 @@
 #  include "BLI_edgehash.h"
 #endif
 
-#include "BLF_translation.h"
+#include "BLT_translation.h"
 
 #include "DNA_material_types.h"
 #include "DNA_curve_types.h"

source/blender/render/intern/source/envmap.c

@@ -37,7 +37,7 @@
 #include "BLI_threads.h"
 #include "BLI_utildefines.h"
 
-#include "BLF_translation.h"
+#include "BLT_translation.h"
 
 #include "IMB_imbuf_types.h"
 #include "IMB_imbuf.h"        /* for rectcpy */

source/blender/render/intern/source/external_engine.c

@@ -36,7 +36,7 @@
 
 #include "MEM_guardedalloc.h"
 
-#include "BLF_translation.h"
+#include "BLT_translation.h"
 
 #include "BLI_listbase.h"
 #include "BLI_string.h"

source/blender/render/intern/source/occlusion.c

@@ -43,7 +43,7 @@
 #include "BLI_threads.h"
 #include "BLI_utildefines.h"
 
-#include "BLF_translation.h"
+#include "BLT_translation.h"
 
 #include "BKE_node.h"
 #include "BKE_scene.h"

source/blender/render/intern/source/pipeline.c

@@ -55,7 +55,7 @@
 #include "BLI_rand.h"
 #include "BLI_callbacks.h"
 
-#include "BLF_translation.h"
+#include "BLT_translation.h"
 
 #include "BKE_animsys.h"  /* <------ should this be here?, needed for sequencer update */
 #include "BKE_camera.h"

source/blender/render/intern/source/pointdensity.c

@@ -40,7 +40,7 @@
 #include "BLI_kdopbvh.h"
 #include "BLI_utildefines.h"
 
-#include "BLF_translation.h"
+#include "BLT_translation.h"
 
 #include "BKE_DerivedMesh.h"
 #include "BKE_lattice.h"

source/blender/render/intern/source/rayshade.c

@@ -45,7 +45,7 @@
 #include "BLI_rand.h"
 #include "BLI_utildefines.h"
 
-#include "BLF_translation.h"
+#include "BLT_translation.h"
 
 #include "BKE_node.h"
 

source/blender/render/intern/source/sss.c

@@ -55,7 +55,7 @@
 #include "BLI_ghash.h"
 #include "BLI_memarena.h"
 
-#include "BLF_translation.h"
+#include "BLT_translation.h"
 
 
 #include "DNA_material_types.h"

source/blender/render/intern/source/volume_precache.c

@@ -44,7 +44,7 @@
 #include "BLI_voxel.h"
 #include "BLI_utildefines.h"
 
-#include "BLF_translation.h"
+#include "BLT_translation.h"
 
 #include "PIL_time.h"
 

source/blender/render/intern/source/voxeldata.c

@@ -46,7 +46,7 @@
 #include "BLI_voxel.h"
 #include "BLI_utildefines.h"
 
-#include "BLF_translation.h"
+#include "BLT_translation.h"
 
 #include "IMB_imbuf.h"
 #include "IMB_imbuf_types.h"