fix relative path resolution in router and link crawling

quartz/util/ctx.ts

@@ -0,0 +1,17 @@
+import { QuartzConfig } from "../cfg"
+import { ServerSlug } from "./path"
+
+export interface Argv {
+  directory: string
+  verbose: boolean
+  output: string
+  serve: boolean
+  port: number
+  concurrency?: number
+}
+
+export interface BuildCtx {
+  argv: Argv
+  cfg: QuartzConfig
+  allSlugs: ServerSlug[]
+}