Add README.md

README.md

+# ChanMan - 4chan Plugin
+
+This repository contains the Yotsuba software handler and 4chan site definition for ChanMan, a search engine that's been in development for a decade.
+
+## Software Handlers
+
+* `4chan` - The handler for Yotsuba-based imageboards.
+
+## Site Definitions
+
+* `4chan` - The definition for 4chan, plus the delay settings to comply with API usage guidelines.
+
+## Miscellaneous
+
+* `data/schema/4chan` - The OpenAPI definition for 4chan.  In development and unused at the moment.
\ No newline at end of file