chore: update project structure, naming, and add reporting infrastructure

- Update all 7 phase docs with source/target location references
  (golang/ for Go source, dotnet/ for .NET version)
- Rename NATS.Server to ZB.MOM.NatsNet.Server in phase 4-7 docs
- Update solution layout to dotnet/src/ and dotnet/tests/ structure
- Create CLAUDE.md with project summary and phase links
- Update .gitignore: track porting.db, add standard .NET patterns
- Add golang/nats-server as git submodule
- Add reports/generate-report.sh and pre-commit hook
- Add documentation_rules.md to version control

docs/plans/phases/phase-3-library-mapping.md

@@ -13,6 +13,13 @@ returns an empty list and every import has a documented .NET migration path.
 - Familiarity with both the Go standard library and .NET BCL / NuGet ecosystem.
 - A working `dotnet` CLI for running PortTracker commands.
 
+## Source and Target Locations
+
+| Component | Path |
+|---|---|
+| Go source code | `golang/` (specifically `golang/nats-server/`) |
+| .NET ported version | `dotnet/` |
+
 ## Steps
 
 ### Step 1: List all unmapped libraries