Refactor: move version.h from source_main to source_base

[Critsium-xy]

Background

As part of an ongoing effort to clean up the dependency relationships between the source_* modules (converging them toward a strictly-layered DAG where dependencies only point downward), this is a small, self-contained first step.

source_main/version.h is a leaf header containing only a single macro:

#ifndef VERSION
#define VERSION "v3.11.0-beta.5"
#endif

Although it has no dependencies, it lived in source_main — the top-level entry layer. This forced source_io to #include "source_main/version.h", i.e. a lower/mid layer reaching upward into the entry layer. This is a reverse dependency (source_io -> source_main) that violates the intended layering.

Change

• Move version.h from source_main/ to source_base/ (the L0 infrastructure layer that every module is allowed to depend on).
• Update all 6 include sites (source_main/version.h -> source_base/version.h): main.cpp, driver.cpp, parse_args.cpp, module_json/general_info.cpp, and the two related unit tests.

Notes

• No behavior change — it is a pure relocation of a header-only macro.
• No CMake changes needed — the header is resolved via the existing source/ include root, exactly like every other source_base/*.h include.
• This cuts the source_io -> source_main reverse edge.