feat(addon-fit): fit to specific dimensions

[DSpeichert]

Allows more control by checking proposed dimensions with additional logic.

[Tyriar]

The whole point of the fit addon is to measure the container. You should just not use it and call Terminal.resize with those dimensions?

[DSpeichert]

My workflow was to use this addon's proposeDimensions() first and validate it according to some external criteria.
If it passed, I'd call fit() with these specific dimensions. Since fit() uses internal/private APIs, I preferred to avoid copying that code to force redraw and rely on the addon, in case it changes in future. You are right that I could call Terminal.resize directly though.