Legendary Days girls filter

[hhanon]

I thought it would be cool to have a filter that only shows the legendary days girls (the native "event"-based one is unusable). Here is a simple module implementation that might be helpful for others (sorry, I am too lazy to create a PR and contribute it properly):

class HaremFiltersModule extends MyModule {
    constructor () {
        const baseKey = 'haremFilters'
        const configSchema = {
            baseKey,
            default: true,
            label: `Show additional harem filters`,
        }
        super({name: baseKey, configSchema})
    }

    shouldRun() {return HHPlusPlus.Helpers.isCurrentPage('harem') && !HHPlusPlus.Helpers.isCurrentPage('hero')}

    run () {
        if (this.hasRun || !this.shouldRun()) {return}

        HHPlusPlus.Helpers.defer(() => {
            // figure out the event ids for LD
            const ld_event_ids = $("select[name=event] option")
                                    .filter((idx, opt) => opt.text.includes("Legendary Days"))
                                    .map((idx, opt) => opt.value)
                                    .get()
                                    .map(id => parseInt(id));

            // mark the girls as LD girls
            Object.values(window.girlsDataList)
                  .filter(e => e.source_selectors.event)
                  .filter(e => e.source_selectors.event.filter(id => ld_event_ids.includes(id)).length)
                  .forEach(g => g.source_selectors.legendary_days = [0]); // TODO fill id, optional

            // add dropdown option
            $("select[name=lists]").append(new Option("Legendary Days", "legendary_days"));
        });

        this.hasRun = true;
    }
}