Docs: Add clearer API doc links (#4461)

* Docs: Add clearer API doc links

* prettier

README.md

@@ -25,14 +25,14 @@ Welcome to the implementation of Arrow, the popular in-memory columnar format, i
 
 This repo contains the following main components:
 
-| Crate        | Description                                                               | Documentation                  |
-| ------------ | ------------------------------------------------------------------------- | ------------------------------ |
-| arrow        | Core functionality (memory layout, arrays, low level computations)        | [(README)][arrow-readme]       |
-| parquet      | Support for Parquet columnar file format                                  | [(README)][parquet-readme]     |
-| arrow-flight | Support for Arrow-Flight IPC protocol                                     | [(README)][flight-readme]      |
-| object-store | Support for object store interactions (aws, azure, gcp, local, in-memory) | [(README)][objectstore-readme] |
-
-See the list of all crates in this repo and their rustdocs [here](https://arrow.apache.org/rust).
+| Crate        | Description                                                               | Latest API Docs                                | README                         |
+| ------------ | ------------------------------------------------------------------------- | ---------------------------------------------- | ------------------------------ |
+| arrow        | Core functionality (memory layout, arrays, low level computations)        | [docs.rs](https://docs.rs/arrow/latest)        | [(README)][arrow-readme]       |
+| parquet      | Support for Parquet columnar file format                                  | [docs.rs](https://docs.rs/parquet/latest)      | [(README)][parquet-readme]     |
+| arrow-flight | Support for Arrow-Flight IPC protocol                                     | [docs.rs](https://docs.rs/arrow-flight/latest) | [(README)][flight-readme]      |
+| object-store | Support for object store interactions (aws, azure, gcp, local, in-memory) | [docs.rs](https://docs.rs/object_store/latest) | [(README)][objectstore-readme] |
+
+The current development version the API documentation in this repo can be found [here](https://arrow.apache.org/rust).
 
 There are two related crates in a different repository
 

arrow-flight/README.md

@@ -21,6 +21,10 @@
 
 [![Crates.io](https://img.shields.io/crates/v/arrow-flight.svg)](https://crates.io/crates/arrow-flight)
 
+See the [API documentation](https://docs.rs/arrow_flight/latest) for examples and the full API.
+
+The API documentation for most recent, unreleased code is available [here](https://arrow.apache.org/rust/arrow_flight/index.html).
+
 ## Usage
 
 Add this to your Cargo.toml:

arrow/README.md

@@ -24,9 +24,11 @@
 
 This crate contains the official Native Rust implementation of [Apache Arrow][arrow] in memory format, governed by the Apache Software Foundation.
 
-The [crate documentation](https://arrow.apache.org/rust/arrow/index.html) contains examples and full API.
+The [API documentation](https://docs.rs/arrow/latest) contains examples and full API.
 There are several [examples](https://github.com/apache/arrow-rs/tree/master/arrow/examples) to start from as well.
 
+The API documentation for most recent, unreleased code is available [here](https://arrow.apache.org/rust/arrow/index.html).
+
 ## Rust Version Compatibility
 
 This crate is tested with the latest stable version of Rust. We do not currently test against other, older versions.

parquet/README.md

@@ -24,7 +24,9 @@
 
 This crate contains the official Native Rust implementation of [Apache Parquet](https://parquet.apache.org/), which is part of the [Apache Arrow](https://arrow.apache.org/) project.
 
-See [crate documentation](https://arrow.apache.org/rust/parquet/index.html) for examples and the full API.
+See the [API documentation](https://docs.rs/parquet/latest) for examples and the full API.
+
+The API documentation for most recent, unreleased code is available [here](https://arrow.apache.org/rust/parquet/index.html).
 
 ## Rust Version Compatibility