Update crates documentation in a readme

README.md

@@ -1,5 +1,20 @@
-# client
+# Client
 
+## Common-API 🦆
+Library that is used among other repositories. Implements [```Borsh```](https://borsh.io/) implementation for structures and enums. Also contain Diffie-Hellman and Ed25519 **API**
+
+## Near-Client 🗿
+Client library for **Near RPC**
+
+## Web-Client 🦘
+Client library for communication from browser and *Near blockchain*. It's a high-level API. User doesn't need to understand how blockchain works.
+
+### Build
+```sh
+wasm-pack build web-client --target bundler --out-dir ../pkg
+```
+
+## Diagrams
 ```mermaid
 sequenceDiagram
     participant Initiator