deer: implement Deserialize for core::mem

[indietyp]

🌟 What is the purpose of this PR?

Implements Deserialize for:

• core::mem::ManuallyDrop

taken from #1875

🔗 Related links

• deer implement Deserialize for built-in types (Part 2)  #1875
• GEN-160: deer type implementation #1700

🔍 Has this modified a publishable library?

This PR:

• modifies an npm-publishable library and I have added a changeset file(s)
• modifies a Cargo-publishable library and I have amended the version
• modifies a Cargo-publishable library, but it is not yet ready to publish
• modifies a block that will need publishing via GitHub action once merged
• does not modify any publishable blocks or libraries
• I am unsure / need advice

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.69%. Comparing base (9420a82) to head (68c54e1).
Report is 3062 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2384   +/-   ##
=======================================
  Coverage   60.69%   60.69%           
=======================================
  Files         313      314    +1     
  Lines       24199    24202    +3     
  Branches      421      421           
=======================================
+ Hits        14687    14690    +3     
  Misses       9507     9507           
  Partials        5        5           

Flag	Coverage Δ
backend-integration-tests	3.66% <ø> (ø)
deer	69.41% <100.00%> (+0.02%)	⬆️
unit-tests	1.49% <ø> (ø)

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