Updating documentation

documentation/SUMMARY.md

@@ -12,4 +12,13 @@
     - [Callbacks](./Features/callbacks.md)
     - [Functions Table](./Features/functions_table.md)
 - [Collections Overview](./Overview/overview.md)
+- [utl](./utl/utl.md)
+    - [assert.h](./utl/assert.h/index.md)
+        - [Overview](./utl/assert.h/overview.md)
+        - [Single Value Assertion](./utl/assert.h/single_value_assertion.md)
+        - [Array Assertion](./utl/assert.h/array_assertion.md)
+    - [foreach.h](./utl/foreach.md)
+    - [log.h](./utl/log.md)
+    - [test.h](./utl/test.md)
+    - [timer.h](./utl/timer.md)
 - [Examples](./Examples/examples.md)