[FEATURE] Provide download links in readme to the assets

[wsbrenk]

Many users don't know which assets to use for their environment.

Idea is to provide a Download chapter in readme with links to those assets with an explanation of each of them

[wsbrenk]

the assets don't have fixed names (they include the version string).

i see 2 ways to handle this:

• make asset names constant by removing the version characters
• create a action step which replaces version placeholders in the readme file with current stable version string