refactor: rebrand MyAutoMapper -> SmAutoMapper (PR #2 of 1.1.0 cleanup)

[tdav]

Summary

PR #2 of the SmAutoMapper 1.1.0 cleanup release. Pure rebrand from MyAutoMapper → SmAutoMapper across the whole tree — directories, csproj files, namespaces, dynamic assembly name, docs, and CI workflow path. No behavior changes.

• Repo URL (github.com/tdav/MyAutoMapper) intentionally preserved (repo rename is out of scope)
• NuGet package id stays SmAutoMapper (matches existing 1.0.x)

Changes

• src/MyAutoMapper/ → src/SmAutoMapper/
• tests/MyAutoMapper.* → tests/SmAutoMapper.*
• samples/MyAutoMapper.WebApiSample → samples/SmAutoMapper.WebApiSample
• 5 csproj files renamed
• SmAutoMapperSol.slnx project paths updated
• <InternalsVisibleTo> fixed to SmAutoMapper.UnitTests
• Namespaces renamed in 4 sample .cs files + all test .cs files
• Dynamic assembly name in ClosureHolderFactory.cs → SmAutoMapper.DynamicHolders
• README/README-ru updated
• Benchmark method names MyAutoMapper()/MyAutoMapper_Configure() → SmAutoMapper* (README table already showed SmAutoMapper rows from PR PR #1: CI gate + SourceLink + housekeeping (1.1.0) #1)
• .github/workflows/publish.yml pack path updated
• launchSettings.json profile key updated

Verification

• grep -rn MyAutoMapper src tests samples --include=*.cs --include=*.csproj → only allowed repo URL matches in library csproj
• grep -rn MyAutoMapper .github samples --include=*.yml --include=*.json → empty
• dotnet build -c Release → 0 warnings, 0 errors
• dotnet test -c Release --no-build → 53 UnitTests + 10 IntegrationTests pass (1 known skip)
• Spec compliance review passed
• Code quality review passed (2 fixups applied in c22afcb)

Plan Reference

docs/superpowers/plans/2026-04-17-smautomapper-1.1.0-cleanup.md — PR #2 section (Tasks 2.1-2.10) plus follow-up Task 2.11 (benchmark method names).

Next: PR #3 API cleanup with [Obsolete] on soft-deprecated symbols.