docs: enable timestamps, link in new window, clang assisted parsing

CMakeLists.txt

@@ -11,15 +11,18 @@ cmake_policy(SET CMP0054 NEW)
 cmake_policy(SET CMP0057 NEW)
 find_package(Doxygen OPTIONAL_COMPONENTS dot dia)
 if(DOXYGEN_FOUND)
-set(DOXYGEN_GENERATE_MAN NO)
+    set(DOXYGEN_GENERATE_MAN NO)
     set(DOXYGEN_USE_MATHJAX YES)
     set(DOXYGEN_GENERATE_HTML YES)
+    set(DOXYGEN_HTML_TIMESTAMP YES)
     set(DOXYGEN_EXTRACT_STATIC YES)
     set(DOXYGEN_INLINE_SOURCES YES)
     set(DOXYGEN_CREATE_SUBDIRS YES)
     set(DOCYGEN_GENERATE_TREEVIEW YES)
     set(DOXYGEN_STRIP_CODE_COMMENTS NO)
+    set(DOXYGEN_EXT_LINKS_IN_WINDOW YES)
     set(DOXYGEN_OPTIMIZE_OUTPUT_FOR_C YES)
+    set(DOXYGEN_CLANG_ASSISTED_PARSING YES)
     set(DOXYGEN_FILE_PATTERNS *.c *.h *.md)
     set(DOXYGEN_MATHJAX_EXTENSIONS  TeX/AMSmath TeX/AMSsymbols)
     set(DOXYGEN_TAGFILES "doc/cppreference-doxygen-web.tag.xml=http://en.cppreference.com/w/")