Add Sfold

[reytakop]

FOR CONTRIBUTOR:

• I have read the CONTRIBUTING.md document and this tool is appropriate for the tools-iuc repo.
• License permits unrestricted use (educational + commercial)
• This PR adds a new tool or tool collection
• This PR updates an existing tool or tool collection
• This PR does something else (explain below)

[bgruening]

Please add a .shed.yml to trigger the tests.

[reytakop]

The sfold.xml file was edited and completed. I also added a .shed.yml file.

[bgruening]

sh: line 1: /usr/local/bin/gcg2bp.pl: cannot execute: required file not found

[bgruening]

The file is in the container:

root@0c1333b9f6d8:/# find / -name '*gcg2*'
/usr/local/bin/gcg2bp.pl

Shebang looks also good:

root@0c1333b9f6d8:/# head /usr/local/bin/gcg2bp.pl
#!/usr/bin/env perl

#
# Take GCG connect file as input and convert structure
# to base-pair format
#

```

Maybe it was really just the wrong version number.

[reytakop]

The Planemo test was passed.

[bgruening]

this section can be removed I think, there is only one option

[reytakop]

Thanks for the review. Why only one option?
Sfold can use two modules, "Soligo", "Sirna", or both. It can also use none.

[bgruening]

Its only one select parameter. I'm not sure its worthwhile to hide one parameter under a section. Imho it make sense to hide many parameters in a section. Its just an opinion you can also keep it like that.

[reytakop]

Thanks for your comment. The sfold.xml file was updated based on that.

[reytakop]

The sfold.xml file was edited to fix the error related to test 2. 

[nilchia]

IMO select with multiple="true" without checkbox does not have a good UI/UX.

[nilchia]

looks good to me. Thanks @reytakop

[nilchia]

Congratulations on your first contribution to the Galaxy Reyhaneh! 🎉