Make directory and decision record template configurable via yaml config file

[abachmann]

I would like to use my own ADR template and unfortunately it was not possible. Therefore I introduced a configuration file. Additionally I made the workspace directory configurable via configuration file as well. That's why I removed the "directory" option from the commands.

This is of course a BC, but in my opinion it should not be a big problem for this project.

It would also be very helpful to have a table of contents for all ADRs. What do you think?

[globtec]

You will need to use some keyword besides sequence, title, date and status?
Can you share your ADR template?

I liked of idea of create a table of contents for all ADRs, I thought of the following template:

# Architecture Decision Records 

These are the architectural decisions that are taken while developing this project, follows list of these records:

1. [Documenting architecture decisions](0001-documenting-architecture-decisions.md)
2. [Develop tool to manage ADRs](0002-develop-tool-to-manage-adrs.md)
3. continue...

[abachmann]

For me, the existing keywords are quite sufficient.

I searched for existing ADR templates and found a few I liked:

• https://github.com/eclipse/winery/blob/master/docs/adr/template.md
• https://github.com/schubmat/DecisionCapture/blob/master/templates/captureTemplate_full.md

The following template is a mixture of the existing ones:

• https://gist.github.com/abachmann/016961e883c93e57d13c966e266c74d7

I just want to start documenting decisions in this way. So maybe the template will change over time.

I like your template for the table of contents. Do you have time to add the table of contents? Otherwise I will do it.

Thank you for accepting my PR by the way.