Update README

Signed-off-by: Janne Savolainen <janne.savolainen@live.fi>

packages/technical-features/application/agnostic/README.md

@@ -2,17 +2,38 @@
 
 This package contains stuff related to creating Lens-applications. 
 
-In the beginning it will contain just the injection tokens used to configure the application.
+# Usage
 
-## Install
 ```bash
-$ npm install @k8slens/application
+$ npm install @k8slens/application-for-electron-main
+```
+
+```typescript
+import { applicationFeature, startApplicationInjectionToken } from "@k8slens/application";
+import { registerFeature } from "@k8slens/feature-core";
+import { createContainer } from "@ogre-tools/injectable";
+
+const di = createContainer("some-container");
+
+registerFeature(di, applicationFeature);
+
+const startApplication = di.inject(startApplicationInjectionToken);
+
+startApplication();
 ```
 
 
-## Usage
+## Features
 
-As of now, this package doesn't do anything alone. It just provides you way to register implementation for contract. 
+#### Start application
+`startApplicationInjectionToken`
 
-Future ambition is that all stuff related to how applications are built will be relocated here.
+Starts the application and calls timeslots in specified order. Check for timeslots for more info.
 
+## Extendability
+
+#### Timeslots
+
+1. `beforeApplicationIsLoadingInjectionToken`
+2. `onLoadOfApplicationInjectionToken`
+3. `afterApplicationIsLoadedInjectionToken`