Document codebase in new directory

[rwalkerlewis]

Add a comprehensive guide to the PyLith codebase architecture and functionality in a new code-architecture-guide directory.

---

 

---

Note

Adds a new code-architecture-guide/ with comprehensive docs covering architecture, components, data flow, build, FE implementation, and extension guidance.

• Docs:
  • Add comprehensive architecture documentation under code-architecture-guide/:
    • 01-Architecture-Overview.md, 02-Core-Components.md, 03-Data-Flow.md.
    • 04-Build-System.md, 05-Module-Structure.md, 06-Finite-Element-Implementation.md.
    • 07-Extension-Guide.md, README.md, INDEX.md, QUICK-REFERENCE.md, SUMMARY.md.
  • Content covers architecture, components, data flow, build/test system, Python–C++ integration, FE implementation, extension patterns, quick reference, and index.

^{Written by Cursor Bugbot for commit 8eb7468. This will update automatically on new commits. Configure here.}

[cursor]

Cursor Agent can help with this pull request. Just @cursor in comments and I'll start working on changes in this branch.
_{Learn more about Cursor Agents}