docs: update path references for module-folder reorganization

Rewrite src/ and tests/ project paths in docs, CLAUDE.md, README.md, and
test-fixture READMEs to the new module-folder layout (Core/Server/Drivers/
Client/Tooling). References to retired v1 projects (Galaxy.Host/Proxy/Shared,
the legacy monolithic test projects) are left untouched.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docs/v2/focas-version-matrix.md

@@ -1,7 +1,7 @@
 # FOCAS version / capability matrix
 
 Authoritative source for the per-CNC-series ranges that
-[`FocasCapabilityMatrix`](../../src/ZB.MOM.WW.OtOpcUa.Driver.FOCAS/FocasCapabilityMatrix.cs)
+[`FocasCapabilityMatrix`](../../src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.FOCAS/FocasCapabilityMatrix.cs)
 enforces at driver init time. Every row cites the Fanuc FOCAS Developer
 Kit function whose documented input range determines the ceiling.
 
@@ -122,7 +122,7 @@ matrix: Macro variable #50000 is outside the documented range
 ## How this matrix stays honest
 
 - Every row is covered by a parameterized test in
-  [`FocasCapabilityMatrixTests.cs`](../../tests/ZB.MOM.WW.OtOpcUa.Driver.FOCAS.Tests/FocasCapabilityMatrixTests.cs)
+  [`FocasCapabilityMatrixTests.cs`](../../tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.FOCAS.Tests/FocasCapabilityMatrixTests.cs)
   — 46 cases across macro / parameter / PMC-letter / PMC-number
   boundaries + unknown-series permissiveness + rejection-message
   content + case-insensitivity.