Problem statement: Service Placement

[noegodinho]

Problem statement for the Service Placement problem.

Contains a markdown file with the description of the problem, instance and solutions files and their explanations.

[adbjesus]

@noegodinho for the license of the missing files (txt files inside data) you may consider putting license information inside the .reuse/dep5 (at the root of the repository) as it makes it easier to apply the same license to several files at once (there is already an example there). In the next version of reuse (in a few weeks I think) it will be possible to have a REUSE.toml file for this in each problem folder (and we will convert to that once it is available), but for now .reuse/dep5 is the only option for "mass" license.

[noegodinho]

Thank you for the guidance @adbjesus. Hopefully this last commit solves the problem.

[adbjesus]

Sorry for taking a while to reply back. I just went over the whole submission and there a few things that I would suggest changing. Many of the comments are just some minor formatting improvements. However, there are a few critical ones. Still, I think they should be fast to change.