chore: update README

crates/cli_bin/README.md

@@ -1,5 +1,7 @@
-# grit
+# Grit CLI
 
-This is a README for grit. It will show up on its npm package.
+Grit is a developer tool to simplify software maintenance.
 
-Hello npm!
+Learn more about Grit's products on the [website](https://about.grit.io/) or check out the [documentation](https://docs.grit.io/).
+
+The Grit CLI and additional tooling are distributed as pre-built binaries that are either available for direct download or can be managed with an installer or package manager, such as Homebrew and npm. You can see more details about the release artifacts and installation options [on GitHub](https://github.com/getgrit/gritql/releases).