doc: Include README as top-level module documentation for all crates

cli/loader/README.md

@@ -1,6 +1,6 @@
-# `tree-sitter-loader`
+# Tree-sitter Loader
 
 The `tree-sitter` command-line program will dynamically find and build grammars
 at runtime, if you have cloned the grammars' repositories to your local
-filesystem.  This helper crate implements that logic, so that you can use it in
+filesystem. This helper crate implements that logic, so that you can use it in
 your own program analysis tools, as well.

cli/loader/src/lib.rs

@@ -1,3 +1,5 @@
+#![doc = include_str!("../README.md")]
+
 use anyhow::{anyhow, Context, Error, Result};
 use libloading::{Library, Symbol};
 use once_cell::unsync::OnceCell;