Prusa enclosure corner brackets

I tried other corner brackets and wasn't satisfied due to issues like:
- Insecure attachment, leading to corner brackets falling off after some time
- Poor print stability
- No way to attach zip ties

So, I designed these. They snap into place securely, but can also be removed easily. They print reliably, even without any infill and they come with a loop to attach zip ties.

I printed these from PLA, with 0.15mm layer height (speed profile), no supports and no infill.