doc: readme

README.md

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+# Haqq RPC Clients
+
+This repo contains RPC clients — generated with [buf.build](https://buf.build), patched rough edges and improved with some useful helpers.
+
+## Rust Client
+
+Rust client is fully functional, supports [gRPC](https://github.com/haqq-network/haqq-rpc-clients/blob/master/tests/grpc.rs) and [Rest](https://github.com/haqq-network/haqq-rpc-clients/blob/master/tests/rest.rs) enpoints.
+
+Not published in crates yet but will be any time soon. In order to use, add to your project's `Cargo.toml`:
+
+* `haqq-proto = {git = "https://github.com/haqq-network/haqq-rpc-clients"}` — for gRPC endpoints
+* `haqq-rest = {git = "https://github.com/haqq-network/haqq-rpc-clients"}` — for REST endpoints
+
+## TypeScript Client
+
+Currently only structs are generated in [web](web) folder.
+
+TODO:
+
+[ ] package.json and other packaging-related files
+[ ] tests with usage examples