Make memory accessible from multiple threads/tasks

[nrc]

Factors out a Stack from ProgramMemory which encapsulates a call stack for a module. Multiple Stacks on different threads share a single ProgramMemory which means memory does not need to be reassembled after evaluating a module.

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Name	Status	Preview	Updated (UTC)
modeling-app	✅ Ready (Inspect)	Visit Preview	Feb 28, 2025 4:30am

[codecov]

Codecov Report

Attention: Patch coverage is 95.55556% with 22 lines in your changes missing coverage. Please review.

Project coverage is 86.58%. Comparing base (b31786c) to head (3506bec).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
src/wasm-lib/kcl/src/execution/memory.rs	95.41%	18 Missing ⚠️
src/wasm-lib/kcl/src/execution/mod.rs	93.10%	2 Missing ⚠️
src/wasm-lib/kcl/src/execution/exec_ast.rs	98.24%	1 Missing ⚠️
src/wasm-lib/kcl/src/std/args.rs	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5530      +/-   ##
==========================================
+ Coverage   86.41%   86.58%   +0.16%     
==========================================
  Files          97       97              
  Lines       37194    37431     +237     
==========================================
+ Hits        32143    32411     +268     
+ Misses       5051     5020      -31     

Flag	Coverage Δ
wasm-lib	86.58% <95.55%> (+0.16%)	⬆️

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