Commented AST to CFG converter - functional version (#217)

* Functional AST to CFG converter + tests

* More comments

* More comments

* Remove edge type from fringe

* Revert "Remove edge type from fringe"

This reverts commit b3eb537.

* Fixes for edge type setting

* Split CFG creation into multiple files

* More comments and minor fixes

* Minor fix + comment

* Add remaining missing comments and set edge type for switch

* Used named arguments to increase readability

* Address review

* Update src/main/scala/io/shiftleft/fuzzyc2cpg/passes/cfgcreation/CfgCreator.scala

Co-authored-by: Claudiu-Vlad Ursache <[email protected]>

* Update src/main/scala/io/shiftleft/fuzzyc2cpg/passes/cfgcreation/CfgCreator.scala

Co-authored-by: Claudiu-Vlad Ursache <[email protected]>

* Update src/main/scala/io/shiftleft/fuzzyc2cpg/passes/cfgcreation/CfgCreator.scala

Co-authored-by: Claudiu-Vlad Ursache <[email protected]>

* Update src/main/scala/io/shiftleft/fuzzyc2cpg/passes/cfgcreation/CfgCreator.scala

Co-authored-by: Claudiu-Vlad Ursache <[email protected]>

* Fix comment

Co-authored-by: Claudiu-Vlad Ursache <[email protected]>

Author: fabsx00