Remove lazy named dims array types

[mtfishman]

Summary

Companion PR to ITensor/TensorAlgebra.jl#156 — removes the macro-generated lazy types that are no longer needed with the new LinearBroadcasted design.

What changed

• Delete ScaledNamedDimsArray, ConjNamedDimsArray, AddNamedDimsArray, MulNamedDimsArray and all associated overloads (dimnames, denamed, aligneddims, inds, similar, copy)
• Delete TA.add! overload for named arrays (denaming happens before add! is reached)
• Delete test/test_lazy.jl
• Net -101 lines

Why this works

NamedDimsArrays broadcasting was already implemented correctly via broadcasted_denamed — it recursively denames the Broadcasted tree and delegates to the underlying arrays' broadcasting. The lazy types were only used by explicit *_l/+_l/conjed calls, which nothing depends on.

Contraction via * eagerly denames and contracts via mul_nameddims. mul! denames and calls contractadd!.

Deferred

• Mul with named factors for fused contract+add (Mul(a, b) .+ c -> contractopadd!) — purely an optimization

Dependencies

• Replace AbstractArray lazy types with LinearBroadcasted and Mul TensorAlgebra.jl#156

Test plan

• All basics tests pass (997 tests)
• All TensorAlgebra tests pass (250 tests across 4 element types)
• Full Pkg.test() in CI

Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.88%. Comparing base (57ebba7) to head (6ef8891).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #199      +/-   ##
==========================================
- Coverage   72.10%   70.88%   -1.22%     
==========================================
  Files          21       20       -1     
  Lines        1000      965      -35     
==========================================
- Hits          721      684      -37     
- Misses        279      281       +2     

Flag	Coverage Δ
docs	17.77% <ø> (+0.64%)	⬆️

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