Update i/o API in all examples (within reason)

Recently we updated the API for i/o to pluralise a lot of outputs. Here I have fixed a lot of the examples scripts (mainly hydro tests) that load this data and use it. I have also attempted to update those that use the swiftsimio API.

added 1 commit

• e17980aa - Update sub-grid names in the i/o in examples/*

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Impossible to test all of these. We'll fix as we go if needed.

merged

mentioned in commit c92ee9fc