exercises table update

* new concept exercises issues

* new exiting loops concept exercise issue

* Fix rendering issue

* applied prettier

* Add exiting loops reference page

* Improve exiting-loops concept

* add reference

* fix links

* fix broken links

Author: DavidGerva

reference/concepts/exiting_loops.md

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+# Exiting Loops
+
+Sometimes you need to abort or otherwise modify a loop (both `while` or `for` loops). You may want your program to exit it completely or skip part of it before continuing with the next iterations. You can do these actions with [break](./keywords/break.md) and [continue](./keywords/continue.md) python's keywords.
+
+See [this blog post][exiting-loop-ref] for more details.
+
+[exiting-loop-ref]: https://www.tutorialspoint.com/python/python_loop_control.htm