add star system for presets

[XDcsy]

Implements #700, following the existing logic and UI patterns of the model star feature to ensure consistency.

BTW, I noticed that the current model star feature does not preserve the starred status after a model is renamed. In this PR, the starred status is preserved when a preset is renamed.

I did not modify the model-related behavior to keep this PR focused, but I would be happy to submit another one if needed.

Has been manually tested on Linux.

[mcmonkey4eva]

This is the wrong approach -- Presets are already user-stored data, so they don't need a separate storage the way models do. They just need a boolean on the preset data

[hansneddyanto]

Hi @mcmonkey4eva Just wanted to clarify, the approach should be having an additional boolean column in t2i_presets (something like "IsStarred") to indicate whether a preset is starred or not ya instead of storing it in GenericData?

[mcmonkey4eva]

not a "column", a "field", not in "t2i_presets" in T2IPreset, but yes.