Fix/2480/loading formerly loaded files

[Hall-Ma]

Loading formerly loaded files

Close: #2480

Description

Problem:

• User could not load identical files (equal file name and MD5 hash) into CodeCharta

Solution:

• Now user can upload identical files (equal file name and MD5 hash) without any error messages into CodeCharta, but only one file is showed
• Now user can upload files with different files names but same MD5 hashes, replacing the previous file name with the new one
• Now user can upload files with equal file names but different MD5 hashes, adding a number to the file names to better distinguish the files

[ce-bo]

Nit picking: Intentionally, "invalid-md5-sample" should express that the sample value is not a valid md5. So, "valid-md5-sample" is a bit confusing here. I agree that the former is not that obvious. Therefore, we could just omit the prefix "valid".

[ce-bo]

LGTM! However, we could remove the recentFiles handling from the store because it is nowhere else needed and it just makes no sense to dispatch this. The recentFiles array is used to get access to the first uploaded file, so that it can be marked as selected. This can be done locally in codeCharta.service.ts.