perebalazs/LowLevelFEM.jl: v1.11.0

LowLevelFEM v1.11.0 Diff since v1.10.19 New release: 1.11.0 Bug fixes bug fixes New features Added Operator-level assembly of Poisson-type PDEs for scalar and vector fields sourceVector alias for RHS assembly in general PDE formulations Support for weighted weak forms (e.g. axisymmetric and spherically symmetric problems via coefficient fields) Documentation Extended documentation highlighting operator-level FEM workflow Clarified distinction between mechanical loads and PDE source terms Compatibility Fully backward compatible with previous 1.x releases