Support multiple source directories

[JohT]

🚀 Feature

• Support multi repository git log import: With this you can now import multiple source repositories and import their git log data into the graph database.

• Add git repository node and connect it to the corresponding git log nodes: For every imported git repository there is now a new node with labels (Git:Repository) that contains overall information about the repository as well as is linked to the other nodes of that project (commits, change spans, authors and files).

• Use full git commit hash length instead of the abbreviated one: Previously, commit hashes where given in their abbreviated form. To make errors due to duplicate hashes super unlikely, the full commit hash is now used for every (Git:Log:Commit) node.

• Provide generic download script for Typescript projects. Downloading Typescript projects is now much simpler because of this new generic download script that can be used for most of the Typescript projects. The previous download scripts specific to react-router and ant-design are still included to have an example on how to call the generic script.

⚙️ Optimization

• Move Neo4j import directory into main analysis directory: Now, there is no need to navigate into the tools directory and Neo4j's internal import directory any more. Just put the (CSV) files to be imported into the analysis workspace directory's new "import" folder.
• Integrate new multi source git import into the scan procedure.: Now, importing git data isn't part of the preparation step anymore that is executed every time an analysis is started. Instead, it is now part of the scan process, that is only executed when the analysis data changes.

🛠 Fix

• Fix typo in comment