…d a single if

A small improvement have been done also since now after the first failing if the following one are no more executed

now parser detect also opened but not closed if branching

This is a first draft, more test and improvements are needed

skip also test for foreach zip, this will need a separated statement

skip all statements in the last (already not valid) loop

⚠  This is a breaking change! ⚠

Try also to simplify end events, to be see if this is a good choice or bring in some bugs! Time for testing

…he if condition will not make the contract to fail

fix also some more transitions

…se list, prime numbers, factorial)

this can maybe serve as docs if we want to have a page in the docs where we challenge people with zencode exercises

checks are done only on the first loop and store some more data in iter object to avoid some calculations at each step

… when exeeding it

add also tests for it

unfortunately this do not improve performance, but anyway code is cleaner for sure

…s to save lookup times

…ll to garbage collector (#969)

* refactor: try to improve performance

* ITER stack built at parse time
* avoid string/regexp checks in manage functions by doing it in the parse part and just do a lookup in the latter
* run manage functions only when needed

* feat: on zencode run perform garbage collection only if memory being used is more than MAXMEM

MAXMEM default value is 1024MB, but can be changed using the maxmem conf

* fix: typo in default value of maxmem

* docs: update config page

remove some old and not anymore present config and add scope and maxmem, try also to improve description of other config.

* docs: add foreach to zenroom documentation

* docs(foreach): rename some section title and add section on how to create the material in this page

* docs(if): exlpain the new way in which the if and endif work

BREAKING CHANGE: support for nested if and foreach
* EndIf now closes only the last opened branching
* Error inside a If branch correctly propagate, only failing assertion in the if condition are captured and add to the stack
* Multiple Foreach now does not run anymore in parallel (zip), but as nested foreach