feat:#10 added neo4j docker and setup readme for new component

datamanager/README.md

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+# Data Manager
+
+This component is responsible for fetching data from the HTWK website and storing it in the database.
+It's also responsible for providing migration scripts for the database.
+Main functionality is to fetch groups, plans and sport events. Saving user created ical Feeds
+and providing them to the user is part of another component.
+
+The technology stack is as follows:
+- Neo4j
+- Golang
+- Docker
+- Docker-Compose
+
+## Setup
+
+### Prerequisites
+
+- Docker