13-documentation.md

13) Documentation deliverables (out of architecture scope, listed for traceability)

• Rewritten README.md (PRD §2 documentation NFR).
• Updated examples/: lambda-first hello world, class-based shared-state example (PRD §3.4).
• RELEASE_NOTES.md (informational; not a compatibility commitment).
• Doxygen / inline doc updates for every renamed and reshaped public method. A check-doxygen.sh CI gate (check-local target in Makefile.am) enforces zero substantive Doxygen warnings permanently.

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