Feature/#17 resource handling helper classes

[ABMC831]

Simplified examples to put more stress on what is part of config and what part of usage

Implemented custom resource handler

Added (commented-out) invocation in scala 3 environment (with scala provided resource handler)

closes #17

[OlivieFranklova]

Could you please extend README.md with some guidelines that describe how to run files in the example module and how to use the library, or provide a better description of what and how it's used in example files?

[ABMC831]

Could you please extend README.md with some guidelines that describe how to run files in the example module and how to use the library, or provide a better description of what and how it's used in example files?

to run files in example... well... you run example.....
to have some description in readme... well why not... but probably as separate issue, or do you think it belongs to this PR

[OlivieFranklova]

Could you please extend README.md with some guidelines that describe how to run files in the example module and how to use the library, or provide a better description of what and how it's used in example files?

to run files in example... well... you run example.....
to have some description in readme... well why not... but probably as separate issue, or do you think it belongs to this PR

It should be a new issue, it could be solved in this one #21