feat: add support for .tpp and .ipp within INC+=

* .tpp | Implementation (sometimes declaration) of template functions
* .ipp | Implementation of inline/template code

Author: jerzyjamroz

configure/RULES_BUILD

@@ -22,6 +22,8 @@ vpath %.cpp $(USR_VPATH) $(ALL_SRC_DIRS)
 vpath %.rc $(USR_VPATH) $(ALL_SRC_DIRS)
 vpath %.h $(USR_VPATH) $(ALL_SRC_DIRS)
 vpath %.hpp $(USR_VPATH) $(ALL_SRC_DIRS)
+vpath %.tpp $(USR_VPATH) $(ALL_SRC_DIRS)
+vpath %.ipp $(USR_VPATH) $(ALL_SRC_DIRS)
 vpath %.html $(USR_VPATH) $(ALL_SRC_DIRS) $(COMMON_DIR)
 vpath %.md $(USR_VPATH) $(ALL_SRC_DIRS) $(COMMON_DIR)
 vpath %.skel.static $(USR_VPATH) $(ALL_SRC_DIRS)