baur diff: add input-str and lookup-input-str functionality to diff command

[dbason]

The input str and diff commands are both looking really good, there is just one more piece to help round out our use case (https://github.com/simplesurance/baur/issues/117)

We would like to combine the two so that we can also use the input-str functionality when we are diffing the last build. The two pieces of functionality would be:

• When input-str is added using the carrot(^) notation it will look up the builds with the input-str. The diff will then use the input str to do the comparison
• When lookup-input-str is provided if no previous build is found with the input-str it will then do the search using the lookup-input-str. For the purposes of comparison both the previous build and the current working directory will use the input-str.

Please let me know if anything needs further clarification

[dil-spayne]

@fho This issue has been addressed by the changes in Add input-str and limit filtering to ls runs command. We now have all of the required changes to address our use case. When can we expect the next release to be published? FYI @dbrougham

[fho]

@StephenDiligent hard to tell, depends on how many other more important things will come up at my work. :-)

All the major changes are implemented. There are only some smaller things left that I'll finish in the next days (https://github.com/simplesurance/baur/milestone/1). I aim to have a first -rc release until end of the month. We will then already migrate our companies internal CI workflow to the new version and start to use it.