feat: move guide to guides

docs/guides/introduction.md

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+# Introduction
+
+🎉 Services for everything and anything World of Tanks Blitz
+
+## Bot
+
+BlitzKit is available as a Discord bot and can be [installed very easily](/guide/invite).
+
+- Track statistics
+- Find inactive players in a clan
+- Lookup owned tanks
+- Create embeds for streams
+- Track a player/tanks statistical evolution
+- ...and a variety of other similar things
+
+## Website
+
+Provides a bunch of very helpful tools; https://blitzkit.app/
+
+- Session tracker
+- Rating leaderboard
+- Way more to come