docs(angular-ionic): add installation page (#1128)

* docs(angular-ionic): installation

* docs(installation): typo & structure

* docs(installation): pnpm format

* docs(installation): typo

* feat(installation): admonition

---------

Co-authored-by: Edouard Bozon <bozonedouard@gmail.com>

docs/.vitepress/config.mts

@@ -109,6 +109,10 @@ function sideNavDocs() {
       collapsible: true,
       collapsed: true,
       items: [
+        {
+          text: 'Installation',
+          link: '/docs/ionic-angular/installation',
+        },
         {
           text: 'Generators',
           link: '/docs/ionic-angular/generators',

docs/docs/ionic-angular/installation.md

@@ -0,0 +1,97 @@
+# Getting Started
+
+This plugin configures Ionic and Capacitor for an Angular application.
+
+## Install Plugin
+
+:::info
+
+This plugin configures an already existing Angular application.  
+Please, visit the [Nx documentation](https://nx.dev/nx-api/angular) to generate an application before continuing.
+
+:::
+
+```bash
+npm install @nxext/ionic-angular --save-dev
+```
+
+## Add Ionic-angular to a new Project
+
+1. _Optional_ generate the new project : _[Nx doc](https://nx.dev/nx-api/angular)_  
+   `nx g @nx/angular:application my-app --directory=apps/my-app`
+2. Now, change the configuration of the app, to support ionic-angular: _[Nxext doc](./generators)_  
+   `nx g @nxext/ionic-angular:configuration my-app`
+
+### Capacitor
+
+Running the configuration generator will set up the Capacitor CLI by
+
+- Adding new targets inside your `project.json`.
+
+These targets let you interact with the [Capacitor CLI](https://capacitorjs.com/docs/cli).  
+_See the [related documentation](/docs/capacitor/overview) for more details._
+
+## Add Capacitor to an existing project
+
+3. Follow the step `1.` and `2.` as they are **required**.  
+   _This library isn't ment to replace `@nx/angular` but just to add an additional logic_
+4. Now, every `@capacitor` module will have to be declared inside the newly created `package.json` like follow
+
+```jsonc
+// ./apps/my-app/package.json
+{
+  "name": "my-app",
+  "devDependencies": {
+    "@capacitor/android": "../../node_modules/@capacitor/android",
+    "@capacitor/app": "../../node_modules/@capacitor/app",
+    "@capacitor/cli": "../../node_modules/@capacitor/cli",
+    "@capacitor/core": "../../node_modules/@capacitor/core",
+    "@capacitor/ios": "../../node_modules/@capacitor/ios",
+
+    // Example of a new capacitor plugin
+    "@capacitor-community/apple-sign-in": "../../node_modules/@capacitor-community/apple-sign-in",
+    "@capacitor/camera": "../../node_modules/@capacitor/camera"
+  }
+}
+```
+
+## Add Native Platforms
+
+8. Add the native `android` and `ios` platforms
+
+```
+nx run my-app:add:ios
+nx run my-app:add:android
+```
+
+## Sync Native Platform
+
+9. Running the sync command will update the native platform dependencies and copy a build of your frontend project to the Capacitor project:
+
+```
+nx run my-app:sync:ios
+nx run my-app:sync:android
+```
+
+## Additional: Podfile
+
+10. You may want to, (re)init your Podfile  
+    a. Open the `my-app/ios/App` folder in your terminal
+    b. Run `pod install`
+
+## Open Native platform
+
+11. Finally, you can open the native platform in it's respective IDE:
+
+```
+nx run my-app:open:ios
+nx run my-app:open:android
+```
+
+## Migrate from non nx repo
+
+5. Follow steps `1. - 3.`
+6. Copy your code inside your project
+7. Follow by the step `4.` then `8. - 11.`
+
+Should be now working, [open an issue](https://github.com/nxext/nx-extensions/issues) in case you encounter any errors