Add startup.si scraper

startup.si has no public jobs API or feed, so parse the listing page.
It lists every posting since 2019 on one page, so only postings from
the last 90 days are kept. Also decode common named HTML entities
(š, ž, č, dashes, quotes) case-sensitively.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scrapper/src/scrapers/index.ts

@@ -1,4 +1,5 @@
 import { sloTech } from "./slotech";
+import { startupSi } from "./startupsi";
 import type { Scraper } from "./types";
 
 /**
@@ -8,6 +9,7 @@ import type { Scraper } from "./types";
  */
 export const scrapers: Scraper[] = [
   sloTech("Ljubljana"),
+  startupSi(),
 ];
 
 export type { Scraper, ScrapedJob } from "./types";