Add README

README.md

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+# Twitch chat bot
+
+The bot listens for responses to `!quote add`, `!quote edit` and `!quote remove` commands, and updates the quotes database accordingly  
+using [HTTP API](https://gitea.brno.mraveniste.cc/turbotraktor/ladylilia.com/src/branch/master/api/README.md).
+
+## Supported commands
+
+* `!lastquote` - requests the most recent quote  
+* `!findquote PATTERN` - searches for quotes matching `PATTERN` and in case multiple matches are found, requests one of them randomly  
+    - `PATTERN` has to be at least 3 characters long and it can be enclosed in double quotes in case it contains spaces
+* `!sync [SINCE]` - performs synchronization of the quotes database with Twitch VODs recorded since `SINCE`  
+    - if `SINCE` is not specified, date of the most recent quote is used  
+    - only master user is allowed to use this command