auto-task(leftHandedRep): record TODO to rename Weyl fermion representations

[jstoobysmith]

Summary

Records a single TODO item in
Physlib/Relativity/Tensors/ComplexTensor/Weyl/Basic.lean, next to the
definition of leftHandedRep, proposing to rename the four Weyl fermion
representations into the namespaces of the modules they act on:

• leftHandedRep → LeftHandedWeyl.rep
• dualLeftHandedRep → DualLeftHandedWeyl.rep
• rightHandedRep → RightHandedWeyl.rep
• dualRightHandedRep → DualRightHandedWeyl.rep

Changes

• Added public import Physlib.Meta.TODO.Basic.
• Added one TODO "..." command immediately before leftHandedRep.

No declarations were renamed or implemented; this only records the task. The
project still builds cleanly.

---

Human review

• Does the TODO item look correctly placed in the library and an accurate reflection of the input? Yes

[github-actions]

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[zhikaip]

If this is an auto task I'd rather the PR says more clearly what is being automated, i.e. is it just implementing a user-provided TODO verbatim or did user provide a prompt? (If the latter, maybe the PR summary should include the prompt as well?)

Approved anyway

[jstoobysmith]

@zhikaip Yep agreed. I've updated this, and the PR summary now looks like that of #1312, where it includes the original prompt.

The user provides the TODO item, then what is automated is: Fitting the TODO item within the project (i.e. the right place, location, making it fit what is already there etc.)