TeamCity integration improvements

[kaenganxt]

As the installation was quite difficult, the following things could be improved:
General:

• Note somewhere that the bot client needs to be registered manually and also invited to join the required room
• Make clear why the bot stops on the first start -> Tell the user to set the device id or do it automatically
• Leaving the two "" at https://github.com/Gurkengewuerz/matrix-bot/blob/main/config.yaml.sample#L19 doesn't work
• Say somewhere that the url at https://github.com/Gurkengewuerz/matrix-bot/blob/main/config.yaml.sample#L23 is not allowed to end with a /

TeamCity plugin:

• I don't see a reason for the build config filter as the Webhook plugin in TeamCity lets me already filter the build configs
• The failed state is called "failure" (https://github.com/Gurkengewuerz/matrix-bot/blob/main/plugins/teamcity.js#L58)
• It would be nice to be able to configure the messages at a config file instead of the js file (e.g. I added the branch name to the message with on branch <code>" + buildBranch + "</code>)

[Gurkengewuerz]

Hey @kaenganxt. First of all thanks for testing this bot and setting it up!
The easier things are fixed. I will add a templating option to support customization and also language customization but it requires some time.
I also try to be dynamic on the webhooks but i have to look at it again.

P.S. wow.... github closes this issue automatically after mentioned "fixed" 🙃