Improve git history treemap visualizations and uncover pairwise changed files

[JohT]

🚀 Feature

• Add plot highlighting directories with very few authors
• Add treemap plot that shows commit counts of pairwise changed files: Now you can additionally see which areas in the code base where changed in conjunction with at least one other file.
• Add CHANGED_TOGETHER_WITH edge for git file nodes: With this change, there is now the new relationship CHANGED_TOGETHER_WITH between File nodes (git as well as code) including a property commitCount on how often they were changed together. This adds an additional way of uncovering dependencies of files, besides code dependencies via imports.

⚙️ Optimization

• Change default svg rendering size to 1080x1080

[JohT]

Here is a sneak peek of the added plot focussing on code areas that have very few or only one author.
With reversed coloring and adapted 0.33 quantile limiting it looks like this:

[Copilot]

Copilot reviewed 1 out of 8 changed files in this pull request and generated 1 comment.

Files not reviewed (7)

• cypher/GitLog/Add_CHANGED_TOGETHER_WITH_relationships_to_code_files.cypher: Language not supported
• cypher/GitLog/Add_CHANGED_TOGETHER_WITH_relationships_to_git_files.cypher: Language not supported
• cypher/GitLog/List_git_files_that_were_changed_together.cypher: Language not supported
• cypher/GitLog/List_git_files_that_were_changed_together_all_in_one.cypher: Language not supported
• cypher/GitLog/List_git_files_that_were_changed_together_with_another_file.cypher: Language not supported
• cypher/GitLog/List_git_files_that_were_changed_together_with_another_file_all_in_one.cypher: Language not supported
• scripts/importGit.sh: Language not supported