Feature - File Uniqueness Checks

[Toocky]

The following changes are implemented

when uploading a file it would be good to check the file is unique within its own module or within a specific target module

if there is a duplicate detection then allow a choice of options ie alert with link to existing record, or open in modal or new tab or same tab

i used xxhash for its speed and the fact that it was already in the project

#2314

Changes in the user interface:

in the field options you can choose to enforce uniqueness, and choose what you want to happen on conflict

the others are self explanatory the alert appears like this

the other option is you can select a different module to validate uniqueness against

Checklist when submitting a final (!draft) PR

• Commits are tidied up, squashed if needed and follow guidelines in CONTRIBUTING.md
• Code builds
• All existing tests pass
• All new critical code is covered by tests
• PR is linked to the relevant issue(s)
• Rebased with the target branch

[Fajfa]

@Toocky I would merge this, but for that I'd really like you to clean up the commit history. I would expect one commit per fix/feature. And no merge commits please.

Also if you can remove gitignore for claude and your local dev things.