fix crate documentation (#4415)

## Motivation

Make crate documentation uniform

## Proposal

Add missing data

## Test Plan

CI

## Release Plan

- These changes should be backported to the latest `testnet` branch,
then

Author: ma2bd

linera-metrics/Cargo.toml

@@ -1,11 +1,15 @@
 [package]
 name = "linera-metrics"
-version.workspace = true
+description = "A library for Linera server metrics."
+readme = "README.md"
+documentation = "https://docs.rs/linera-metrics/latest/linera_metrics/"
+
 authors.workspace = true
-repository.workspace = true
+edition.workspace = true
 homepage.workspace = true
 license.workspace = true
-edition.workspace = true
+repository.workspace = true
+version.workspace = true
 
 [dependencies]
 anyhow.workspace = true

linera-metrics/README.md

@@ -0,0 +1,13 @@
+<!-- cargo-rdme start -->
+
+A library for Linera server metrics.
+
+<!-- cargo-rdme end -->
+
+## Contributing
+
+See the [CONTRIBUTING](../CONTRIBUTING.md) file for how to help out.
+
+## License
+
+This project is available under the terms of the [Apache 2.0 license](../LICENSE).

linera-metrics/src/lib.rs

@@ -1,4 +1,6 @@
 // Copyright (c) Zefchain Labs, Inc.
 // SPDX-License-Identifier: Apache-2.0
 
+//! A library for Linera server metrics.
+
 pub mod prometheus_server;

linera-persistent/Cargo.toml

@@ -1,11 +1,15 @@
 [package]
 name = "linera-persistent"
-version.workspace = true
+description = "A library for persisting data types to disk with a variety of backends."
+readme = "README.md"
+documentation = "https://docs.rs/linera-persistent/latest/linera_persistent/"
+
 authors.workspace = true
-repository.workspace = true
+edition.workspace = true
 homepage.workspace = true
 license.workspace = true
-edition.workspace = true
+repository.workspace = true
+version.workspace = true
 
 [features]
 fs = ["fs-err", "fs4"]