fix(folder): use memoized trie instead of handrolled path solution (closes #1767)

quartz/components/PageList.tsx

@@ -1,4 +1,4 @@
-import { FullSlug, resolveRelative } from "../util/path"
+import { FullSlug, isFolderPath, resolveRelative } from "../util/path"
 import { QuartzPluginData } from "../plugins/vfile"
 import { Date, getDate } from "./Date"
 import { QuartzComponent, QuartzComponentProps } from "./types"
@@ -8,6 +8,13 @@ export type SortFn = (f1: QuartzPluginData, f2: QuartzPluginData) => number
 
 export function byDateAndAlphabetical(cfg: GlobalConfiguration): SortFn {
   return (f1, f2) => {
+    // Sort folders first
+    const f1IsFolder = isFolderPath(f1.slug ?? "")
+    const f2IsFolder = isFolderPath(f2.slug ?? "")
+    if (f1IsFolder && !f2IsFolder) return -1
+    if (!f1IsFolder && f2IsFolder) return 1
+
+    // If both are folders or both are files, sort by date/alphabetical
     if (f1.dates && f2.dates) {
       // sort descending
       return getDate(cfg, f2)!.getTime() - getDate(cfg, f1)!.getTime()