[FEATURE] Facilitate Site package installation (#75)

By providing folder "packages" by default and having it as repository in the composer.json

Additionally link to getting started and site package tutorial from readme

Releases: main, 13, 12

README.md

@@ -55,6 +55,11 @@ Apache 2 or Nginx, you can instantly run the project by using PHPs` built-in
 Please be aware that the built-in web server is single threaded and only meant
 to be used for development.
 
+##  Next steps
+
+* [Getting Started with TYPO3](https://docs.typo3.org/permalink/t3start:start)
+* [Create a Site Package](https://docs.typo3.org/permalink/t3sitepackage:start)
+
 ## License
 
 GPL-2.0 or later

composer.json

@@ -39,5 +39,11 @@
 		"typo3/cms-tstemplate": "^12.4",
 		"typo3/cms-viewpage": "^12.4",
 		"typo3/cms-webhooks": "^12.4"
-	}
+	},
+	"repositories": [
+		{
+			"type": "path",
+			"url": "./packages/*"
+		}
+	]
 }