[Item] add Clear Amulet

[allen925]

PR is stay as draft until game is at a stage that it should be implemented, which means this pr is kept as draft if anyone needs it in future.
(note: I planned to request some assistance from artist channel for item icon, as the one I am using is compressed from bulba, but since pr is not accepted currently so it'll just be there for functionality)

balance team:

What are the changes the user will see?

prob nothing right now as i have not added it into any pool

Why am I making these changes?

issue related

What are the changes from a developer perspective?

item's current effect:

1. prevents carrier to drop stat 10% per stack up to max 50%,
2. does not work for selfTarget moves like Close Combat,
3. can be effected by haze.

Added code:
an item modifier (PreventStatLowerChanceModifier)
with modifier type (PreventStatLowerChanceModifierType)
a section checking clear amulet in stat-change-phase

Screenshots/Videos

(The item count is 10 in video for 100% chance to showcase that prevents stat drop, it's max at 5 for 50% actually. )

haze-reset-correctly.mp4

contrary-apply-correctly.mp4

How to test the changes?

run locally.

Checklist

• I'm using beta as my base branch

• There is no overlap with another PR?

• The PR is self-contained and cannot be split into smaller PRs?

• Have I provided a clear explanation of the changes?

• Have I considered writing automated tests for the issue?
  not yet

• If I have text, did I add placeholders for them in locales?

• Have I tested the changes (manually)?

  • Are all unit tests still passing? (npm run test)
    but there is possibility that may randomly breaking tests... maybe?
    

• Are the changes visual?

  • Have I provided screenshots/videos of the changes?