Complete documentation fo usage with Ignite

### Problem Description

Since the switch to Java 17 there are some additional settings required when connecting to Ignite:

```
--add-opens=java.base/jdk.internal.misc=ALL-UNNAMED
--add-opens=java.base/sun.nio.ch=ALL-UNNAMED
--add-opens=java.management/com.sun.jmx.mbeanserver=ALL-UNNAMED
--add-opens=java.base/sun.reflect.generics.reflectiveObjects=ALL-UNNAMED
--add-opens=jdk.internal.jvmstat/sun.jvmstat.monitor=ALL-UNNAMED
--add-opens=jdk.management/com.sun.management.internal=ALL-UNNAMED
--add-opens=java.base/java.io=ALL-UNNAMED
--add-opens=java.base/java.nio=ALL-UNNAMED
--add-opens=java.base/java.util=ALL-UNNAMED
--add-opens=java.base/java.lang=ALL-UNNAMED
--add-opens=java.base/java.lang.invoke=ALL-UNNAMED
--add-opens=java.base/java.math=ALL-UNNAMED
--add-opens=java.base/java.util.concurrent=ALL-UNNAMED
--add-opens=java.base/java.util.concurrent.locks=ALL-UNNAMED
--add-opens=java.base/java.util.concurrent.atomic=ALL-UNNAMED
--add-opens=java.sql/java.sql=ALL-UNNAMED
--add-opens=java.base/java.time=ALL-UNNAMED
--add-opens=java.base/java.text=ALL-UNNAMED
```
In fact, these settings are also necessary when connecting to H2 but using geotools at another point in the project to connect to a Geopackage because geotools circles through all available DB drivers and tries to initialise them (which is probably not best practice?).

Additionally, currently this repository is required:

```

HeiGIT main
Central Repository for OSHDB dependency related artefacts
https://repo.heigit.org/artifactory/main

```

### Expected Solution

Add that information to the documentation. Also make sure that people who read the documentation on the [Helper classes](https://github.com/GIScience/oshdb/tree/master/documentation/manual/helpers) are made aware of this necessity.