docs: Differentiate between HUGR wires and pytket _resources_ in docs

[aborgna-q]

Consider using "Resource" instead of "Wire", when referring to pytket wires. E.g. ResourceTracker instead of WireTracker.

Originally posted by @lmondada in https://github.com/CQCL/tket2/pull/1030#pullrequestreview-3123203014

[lmondada]

👍

an alternative could be to follow hugr's CircuitUnit naming. A resource would be a "linear circuit unit". I think I like "resource" though