docs: remove READMEs and point to online docs

Author: tvinagre

README.md

@@ -1,5 +1,5 @@
 # Tycho Protocol SDK
 
-Tycho Protocol SDK is a library used by solvers to integrate DEX liquidity.
+Tycho Protocol SDK is a library to integrate DEXs and other onchain liquidity protocols into Tycho.
 
-Please refer to the [README.md](docs/README.md) for more information.
+Please refer to the [documentation](https://docs.propellerheads.xyz/tycho/for-dexs/protocol-integration-sdk) for more information.