chore: file agent feedback on define tag argument types

[DylanPiercey]

Files agent-feedback items instead of a fix: <define> tag var calls fall to DefaultRenderer, so valid multi-argument calls report Expected 1 arguments and single arguments go unchecked. It also files three findings from investigating it: attribute tags after tag arguments typed against the wrong input, the per-call type cost of a single-object-param body, and the @marko/language-tools bench measuring nothing.

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