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/cfg.ts

@@ -2,7 +2,6 @@ import { ValidDateType } from "./components/Date"
 import { QuartzComponent } from "./components/types"
 import { ValidLocale } from "./i18n"
 import { PluginTypes } from "./plugins/types"
-import { SocialImageOptions } from "./util/og"
 import { Theme } from "./util/theme"
 
 export type Analytics =