feat(config): apply float_win_config to floating windows

[saying121]

By utilizing the existing optionscan avoid user modifying their config.I think it would be better to do it this way.

[github-actions]

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[mrcjkb]

Thanks 😄

I don't think it makes sense to reuse the tools.hover_actions config, as the name of the field would be inconsistent.

Instead, I would suggest the following:

• Use a tools.float_win_config option, which we apply to all floating windows created by this plugin:

---@field float_win_config table Options applied to floating windows. See |api-win_config|.

To keep backward compatibility, we would have to use the tools.hover_actions options if they exist. But we can remove them from the docs in config/init.lua.

For this, we would also have to update config validations, and add a changelog entry (## [Unreleased], ### Added section).

[saying121]

Got it.