feat(possession): lock the slender's other items while he looks through the creek's eyes

[theEvilReaper]

Proposed changes

While looking through the creek's eyes, the slender still had his full hotbar, and the tracker even worked and scanned around his frozen body. Now the SlenderEye and the tracker show a cooldown for the whole time in the creek, so they cannot be used. They unlock half a second after he is back, so a click meant for the return does not fire them by accident. If an item was already on a longer cooldown before, it shows that again afterwards.

Types of changes

What types of changes does your code introduce to this project?
Put an x in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)

Checklist

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of
them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before
merging your code.

• I have read the CONTRIBUTING.md
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[github-actions]

Test results

  654 files    654 suites   5m 34s ⏱️
1 527 tests 1 525 ✅ 2 💤 0 ❌
4 581 runs  4 575 ✅ 6 💤 0 ❌

Results for commit 253b6dd.