Add a README.md

Author: emilk

crates/rerun-cli/README.md

@@ -0,0 +1,35 @@
+<h1 align="center">
+  <a href="https://www.rerun.io/">
+    <img alt="banner" src="https://user-images.githubusercontent.com/1148717/218142418-1d320929-6b7a-486e-8277-fbeef2432529.png">
+  </a>
+</h1>
+
+<h1 align="center">
+  <a href="https://crates.io/crates/rerun-cli">                           <img alt="Latest version" src="https://img.shields.io/crates/v/rerun-cli.svg">                            </a>
+  <a href="https://docs.rs/rerun-cli">                                    <img alt="Documentation"  src="https://docs.rs/rerun-cli/badge.svg">                                      </a>
+  <a href="https://github.com/rerun-io/rerun/blob/master/LICENSE-MIT">    <img alt="MIT"            src="https://img.shields.io/badge/license-MIT-blue.svg">                        </a>
+  <a href="https://github.com/rerun-io/rerun/blob/master/LICENSE-APACHE"> <img alt="Apache"         src="https://img.shields.io/badge/license-Apache-blue.svg">                     </a>
+  <a href="https://discord.gg/Gcm8BbTaAj">                                <img alt="Rerun Discord"  src="https://img.shields.io/discord/1062300748202921994?label=Rerun%20Discord"> </a>
+</h1>
+
+## Rerun command-line tool
+You can install the binary with `cargo install rerun-cli`
+
+This can act either as a server, a viewer, or both, depending on which options you use when you start it.
+
+Running `rerun` with no arguments will start the viewer, waiting for an SDK to connect to it over TCP.
+
+Run `rerun --help` for more.
+
+
+## What is Rerun?
+- [Examples](https://github.com/rerun-io/rerun/tree/latest/examples/rust)
+- [High-level docs](http://rerun.io/docs)
+- [Rust API docs](https://docs.rs/rerun/)
+- [Troubleshooting](https://www.rerun.io/docs/getting-started/troubleshooting)
+
+
+### Running a web viewer
+```sh
+rerun --web-viewer ../nyud.rrd
+```

crates/rerun-cli/src/bin/rerun.rs

@@ -1,3 +1,6 @@
+//! The `rerun` binary.
+//!
+//! Run `rerun --help` for more information.
 use re_memory::AccountingAllocator;
 
 #[global_allocator]

crates/rerun/README.md

@@ -59,6 +59,5 @@ Run `rerun --help` for more.
 The web viewer is an experimental feature, but you can try it out with:
 
 ```sh
-cargo install --features web rerun
 rerun --web-viewer ../nyud.rrd
 ```