Fixes and improvements on the History API

[racoelhosilva]

History of Transformations based on operation instances

Description

This pull request brings two fixes and improvements to the history of transformations API. While the issues are not fixed yet, the changes assume that they are working as agreed and should integrate with them later on.

Assumed fixes

• Analyze the Joinpoint action replaceWith(Joinpoint[]) as it is causing some issues (a test for this function is now testing if the method works as expected) - as of this commit in the Lara Framework, this is now fixed
• Change the return values of setFirstChild and setLastChild from void to the Joinpoint that previously existed there (assuming this new return value, the API has some internal changes to improve architecture and logic)

References

• The History API previously mentioned is the one from this pull request, obviously, these fixes should only be merged if that pull request has been previously merged

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This work is related to the topic [CSE02] Recording the History of Source-to-Source Transformations, which is part of the INESC TEC Summer Internship 2024