Added robots.txt to try to help AI bots better behave themselves (#645)

robots.txt

@@ -0,0 +1,69 @@
+User-agent: AI2Bot
+User-agent: Ai2Bot-Dolma
+User-agent: aiHitBot
+User-agent: Amazonbot
+User-agent: Andibot
+User-agent: anthropic-ai
+User-agent: Applebot
+User-agent: Applebot-Extended
+User-agent: Brightbot 1.0
+User-agent: Bytespider
+User-agent: CCBot
+User-agent: ChatGPT-User
+User-agent: Claude-SearchBot
+User-agent: Claude-User
+User-agent: Claude-Web
+User-agent: ClaudeBot
+User-agent: cohere-ai
+User-agent: cohere-training-data-crawler
+User-agent: Cotoyogi
+User-agent: Crawlspace
+User-agent: Diffbot
+User-agent: DuckAssistBot
+User-agent: FacebookBot
+User-agent: Factset_spyderbot
+User-agent: FirecrawlAgent
+User-agent: FriendlyCrawler
+User-agent: Google-CloudVertexBot
+User-agent: Google-Extended
+User-agent: GoogleOther
+User-agent: GoogleOther-Image
+User-agent: GoogleOther-Video
+User-agent: GPTBot
+User-agent: iaskspider/2.0
+User-agent: ICC-Crawler
+User-agent: ImagesiftBot
+User-agent: img2dataset
+User-agent: ISSCyberRiskCrawler
+User-agent: Kangaroo Bot
+User-agent: meta-externalagent
+User-agent: Meta-ExternalAgent
+User-agent: meta-externalfetcher
+User-agent: Meta-ExternalFetcher
+User-agent: MistralAI-User/1.0
+User-agent: NovaAct
+User-agent: OAI-SearchBot
+User-agent: omgili
+User-agent: omgilibot
+User-agent: Operator
+User-agent: PanguBot
+User-agent: Perplexity-User
+User-agent: PerplexityBot
+User-agent: PetalBot
+User-agent: PhindBot
+User-agent: QualifiedBot
+User-agent: SBIntuitionsBot
+User-agent: Scrapy
+User-agent: SemrushBot-OCOB
+User-agent: SemrushBot-SWA
+User-agent: Sidetrade indexer bot
+User-agent: TikTokSpider
+User-agent: Timpibot
+User-agent: VelenPublicWebCrawler
+User-agent: Webzio-Extended
+User-agent: wpbot
+User-agent: YandexAdditional
+User-agent: YandexAdditionalBot
+User-agent: YouBot
+Disallow: /
+Crawl-delay: 120.00