fit devonfw-ide setup inside cobigen-cli tutorial

[markusschuh]

Default set of components to be installed in devonfw-ide during setup is

DEVON_IDE_TOOLS=(java mvn eclipse vscode node npm ng)

The UI components in this list - eclipse and vscode - can't run within katacode environment due to missing X11 emulation there. Katacoda instead has its own vscode implementation as IDE - what is perfect for the tutorials, So best fit the setup of devonfw-ide a bit to avoid unnecessary resource usage and avoid setup errors like devonfw/ide#466

DEVON_IDE_TOOLS=(java mvn node npm ng)

N.B.: The devonfw-ide commandlet ng currently does not seem to resolve its dependencies correctly, so setup may fail, if node is removed from this list. Looks like a small bug inside devonfw-ide. Better keep node explicitly within the list.

And how to do this configuration, without too much complexity for the first time user?

As described inside devonfw-ide configuration the set of components included within setup can be modified by different means.
So either introduce a whole own settings-URL - I see you are already working on this at https://github.com/devonfw/katacoda-scenarios-ide-settings. Or for this use case of a configuration tuning in just one setting: Instruct the user, how to customize the components to install within the user-specific defaults file for devonfw-ide - which is ~/devon.properties.

Here is my proposal for a changed step1.md of the cobigen-cli tutorial

...
## devonfw setup

Fit the set of  `devonfw-ide` components to be installed for this tutorial. On your own desktop first time users skip this step and keep the default set, which also setup UI components as `eclipse` and `vscode`:

```
echo "DEVON_IDE_TOOLS=(java mvn node npm ng)" > ~/devon.properties
```{{execute}}

Create the directory where the devonfw ide will be installed.

```
mkdir devonfw

cd devonfw
```{{execute}}


Download the `devonfw-ide` archive and run `setup`. More information about setting up your ide on https://devonfw.com/website/pages/docs/devonfw-ide-introduction.asciidoc.html#setup.asciidoc

```
curl -L "https://repository.sonatype.org/service/local/artifact/maven/redirect?r=central-proxy&g=com.devonfw.tools.ide&a=devonfw-ide-scripts&p=tar.gz&v=LATEST" | tar -xz

./setup https://github.com/devonfw/ide-settings.git
```{{execute}}

The installation process may take a while.

Accept the licence agreements.
`yes`{{execute}}

You can negate the question, if you want to share anonymous data with the Angular Team.
`N`{{execute}}
```