fix(runtime): align module loader and strip option semantics

[buke]

• make SetModuleImport install or clear the default file module loader
• mark SetStripInfo and WithStripInfo as compatibility no-ops
• add runtime tests for module import toggling and refresh README wording

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (c0c659d) to head (c798d72).

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #747   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           17        17           
  Lines         3723      3726    +3     
=========================================
+ Hits          3723      3726    +3     

Files with missing lines	Coverage Δ
runtime.go	100.00% <100.00%> (ø)

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[gemini-code-assist]

Code Review

This pull request updates the module loading mechanism and deprecates strip-info functionality to align with quickjs-ng. Specifically, SetModuleImport now correctly toggles the default file-based module loader using a write lock, and WithStripInfo and SetStripInfo are marked as deprecated no-ops. Documentation and README examples were updated to reflect these changes, and new tests were added to verify the module import toggling. I have no feedback to provide.