define synchronization primitive interface in base layer, implement using os layer; convert all usage -> base layer; use base sync primitives in lane tctx info

src/base/base_inc.c

@@ -12,6 +12,7 @@
 #include "base_arena.c"
 #include "base_math.c"
 #include "base_strings.c"
+#include "base_sync.c"
 #include "base_thread_context.c"
 #include "base_command_line.c"
 #include "base_markup.c"