feat: ckanaction crate implementation with GET actions

README.md

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+# ckanaction
+
+Rust library crate to access CKAN Action API endpoints through Rust builders. Based on the CKAN Action API v3. Endpoints are expected to return with an output of type `serde_json::Value`.
+
+## Example
+
+```rust
+use dotenvy::dotenv;
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    // Load environment variables from .env file
+    dotenv()?;
+
+    // Initialize and build CKAN struct
+    let ckan = ckan_dh_rs::CKAN::builder()
+        .url("http://localhost:5000")
+        .token(dotenvy::var("CKAN_API_TOKEN")?)
+        .build();
+
+    // Send request to /status_show and print output
+    let status_show = ckan.status_show().await?;
+    println!("{status_show:#?}");
+
+    Ok(())
+}
+```
+
+## Notes
+
+- Add the `CKAN_API_TOKEN` environment variable to a `.env` file where the program runs to include the token when making requests to the CKAN API.
+- If you use a `maybe_fn()` then if you provide `None` it will be ignored and that parameter will not be added to the JSON body. This library assumes `None` would not be provided as a value (since the cases where it is a value is often the default value that the CKAN API already has set for that parameter).