Polish 2.0 beta documentation feedback

[dfed]

Summary

• Clarifies the README mock example by making the generateMock: true assumption explicit before calling LoggedInView.mock().
• Updates mockOnly wording in the manual and examples to describe mock-only declarations instead of implying whole types cannot have production participation.
• Adds a short cross-module mock generation guide that distinguishes per-target mock generation from additionalMocksToGenerate in a consuming module.
• Clarifies that an empty #SafeDIConfiguration() declaration is not required when there are no migrated CSV values or other configuration options.

Validation

• git diff --check
• Docs-only change; no test suite run.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (5853444) to head (5cf15e8).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #286   +/-   ##
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  Coverage   100.00%   100.00%           
=========================================
  Files           41        41           
  Lines         7043      7043           
=========================================
  Hits          7043      7043           

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