docs: more documentation for builders (#8746)

* docs: readme for request-utils

* docs: overiew for rest builders

* make REST findRecord builder docs nice

packages/request-utils/README.md

@@ -1,13 +1,66 @@
-@ember-data/tracking
-============================================================================
-
-Tracking Primitives for controlling change notification of Tracked properties when working with EmberData
-
-> Note: This is a V2 Addon, but we have intentionally configured it to act and report as a V1 Addon due
-to bugs with ember-auto-import.
->
-> We can remove the V1 tag if ember-auto-import will no longer attempt
-to load V2 addons or if it is fixed to work with V1 addons with custom addon trees and also dedupes modules for test apps.
-> 
-> You can still consume this as a normal library.
-> In other projects.
+ <p align="center">
+  <img
+    class="project-logo"
+    src="./ember-data-logo-dark.svg#gh-dark-mode-only"
+    alt="EmberData RequestUtils"
+    width="240px"
+    title="EmberData RequestUtils"
+    />
+  <img
+    class="project-logo"
+    src="./ember-data-logo-light.svg#gh-light-mode-only"
+    alt="EmberData RequestUtils"
+    width="240px"
+    title="EmberData RequestUtils"
+    />
+</p>
+
+<p align="center">Utilities for Requests</p>
+
+This package provides Simple utility function to assist in url building, query params, and other common request operations.
+
+It's built for [*Ember***Data**](https://github.com/emberjs/data/) but useful more broadly if you're looking for lightweight functions to assist in working with urls and query params.
+
+## Installation
+
+Install using your javascript package manager of choice. For instance with [pnpm](https://pnpm.io/)
+
+```no-highlight
+pnpm add @ember-data/request-utils
+```
+## Utils
+
+- [buildBaseUrl]()
+- [sortQueryParams]()
+- [buildQueryParams]()
+- [filterEmpty]()
+
+### As a Library Primitive
+
+These primitives may be used directly or composed by request builders to provide a consistent interface for building requests.
+
+For instance:
+
+```ts
+import { buildBaseURL, buildQueryParams } from '@ember-data/request-utils';
+
+const baseURL = buildBaseURL({
+  host: 'https://api.example.com',
+  namespace: 'api/v1',
+  resourcePath: 'emberDevelopers',
+  op: 'query',
+  identifier: { type: 'ember-developer' }
+});
+const url = `${baseURL}?${buildQueryParams({ name: 'Chris', include:['pets'] })}`;
+// => 'https://api.example.com/api/v1/emberDevelopers?include=pets&name=Chris'
+```
+
+This is useful, but not as useful as the REST request builder for query which is sugar over this (and more!):
+
+```ts
+import { query } from '@ember-data/rest/request';
+
+const options = query('ember-developer', { name: 'Chris', include:['pets'] });
+// => { url: 'https://api.example.com/api/v1/emberDevelopers?include=pets&name=Chris' }
+// Note: options will also include other request options like headers, method, etc.
+```