Some changes do log.h and adding its documentation

documentation/SUMMARY.md

@@ -19,6 +19,9 @@
         - [Generic Assertions](./utl/assert.h/generic_assertions.md)
     - [foreach.h](./utl/foreach.h/index.md)
     - [log.h](./utl/log.h/index.md)
+        - [Log Functions](./utl/log.h/log_functions.md)
+        - [Configuration](./utl/log.h/configuration.md)
+        - [Meanings](./utl/log.h/meanings.md)
     - [test.h](./utl/test.h/index.md)
     - [timer.h](./utl/timer.h/index.md)
 - [Examples](./Examples/examples.md)