perf: incremental rebuild (--fastRebuild v2 but default) (#1841)

* checkpoint

* incremental all the things

* properly splice changes array

* smol doc update

* update docs

* make fancy logger dumb in ci

quartz/components/scripts/darkmode.inline.ts

@@ -10,7 +10,7 @@ const emitThemeChangeEvent = (theme: "light" | "dark") => {
 }
 
 document.addEventListener("nav", () => {
-  const switchTheme = (e: Event) => {
+  const switchTheme = () => {
     const newTheme =
       document.documentElement.getAttribute("saved-theme") === "dark" ? "light" : "dark"
     document.documentElement.setAttribute("saved-theme", newTheme)