GitLab

- takes query of elegible volunteers and then builds SemesterProcessVolunteer for each
- if array of volunteer ids is passed, it will only build SemesterProcessVolunteer for these

- if passed from form input, it can build the correct semester that was passed from form input

- so that it can be treated as a child of this in forms
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- relations to all hours with meeting date within the semester
- scaffold empty semesterFeedback record for each mission related
- build the SemesterProcessMail.kind == :mail for the initial mail

feat(semester-process-volunteer): builder that assigns the elegible missions from the volunteer to the SemesterProcessVolunteerMission join table relation

add attr-acessor for selected, in order to be able to filter form selected volunteers on select in form

fix(volunteer-semester-process-elegible): fix have_semester_process with doing subselect, because it didnt work otherwise