feat(statuscolumn): make mouse clicks configurable

[KaspervdHeijden]

Description

This PR enables users to disable mouse clicks events in the statuscolumn for folds.

Tested with configuration:

 {
     'folke/snacks.nvim',
    event = 'VeryLazy',
    opts  = {
        statuscolumn = {
            folds = {
                click_events = false,
                open  = true,
            },
    },
}