chore: Updated README

README.md

@@ -2,14 +2,68 @@
 
 # ember-codemod-remove-inject-as-service
 
-_Codemod to [PROVIDE A SHORT DESCRIPTION.]_
+_Codemod to remove `inject as service`_<sup>1</sup>
+
+1. [Features](#features)
+1. [Usage](#usage)
+    - [Arguments](#arguments)
+    - [Limitations](#limitations)
+1. [Compatibility](#compatibility)
+1. [Contributing](#contributing)
+1. [License](#license)
+
+<sup>1. `@ember/service` has provided `service` since [Ember 4.1](https://blog.emberjs.com/ember-4-1-released/). `inject`, which became an alias to `service`, is [planned to be deprecated in v6](https://rfcs.emberjs.com/id/1001-deprecate-named-inject).</sup>
+
+
+## Features
+
+The codemod helps you standardize how you inject services:
+
+- Replace `inject` with `service`<sup>1</sup>
+- Replace `!` with `declare` in TS files<sup>2</sup>
+- Remove `private` and `readonly` keywords in TS files<sup>2</sup>
+
+It preserves your code whenever possible.
+
+<sup>1. Replaces `inject as ...` and `service as ...`, too.</sup>
+
+<sup>2. Matches [the style shown in the Ember Guides](https://guides.emberjs.com/v5.8.0/typescript/core-concepts/services/#toc_using-services).</sup>
 
 
 ## Usage
 
+Step 1. Quickly migrate.
+
+```sh
+cd <path/to/your/project>
+npx ember-codemod-remove-inject-as-service <arguments>
+```
+
+Step 2. Fix formatting issues.
+
+- Optional: Do a find-and-replace-all, if you want to place `@service()` and `declare` on the same line when possible.
+
+    - Find: `@service\((.+)\)(\n|\s)+declare`
+    - Replace: `@service($1) declare`
+
+- Optional: Do a find-and-replace-all, if you want to place `@service` and `declare` on the same line when possible.
+
+    - Find: `@service(\n|\s)+declare`
+    - Replace: `@service declare`
+
+- Run `lint:js:fix` (i.e. autofix from `eslint` and `prettier`).
+
+
+
 ### Arguments
 
-[PROVIDE REQUIRED AND OPTIONAL ARGUMENTS.]
+You must pass `--type` to indicate what type of project you have.
+
+```sh
+npx ember-codemod-remove-inject-as-service --type app
+npx ember-codemod-remove-inject-as-service --type v1-addon
+npx ember-codemod-remove-inject-as-service --type v2-addon
+```
 
 <details>