Fix: rollback Eigen submodule to 3.4.0 for MSVC compatibility

DamienGilliard · DamienGilliard · commit 289af441f1f2 · 2026-02-19T17:22:33.000+01:00
diff --git a/deps/eigen b/deps/eigen
@@ -1 +1 @@
-Subproject commit 954e21152e204b1960aca802eb9f16d054d70fd9
+Subproject commit 3147391d946bb4b6c68edd901f2add6ac1f31f8c
