Summary

auto increment route position when adding a unassigned route delivery item to a route
set disabled increment/decrement route button when no route selected / not able to increment/decrement
on increment/decrement, shift all other route positions in the list
fix create client error inserting into database: client should not inherit from User class
fix create volunteer error inserting into database: availabilities/availabilities last updated nullable
fix seeding client now that it doesnt inherit from User class
soft delete attribute for volunteer / client
filter by soft delete attribute when get volunteer / client
multiselect input for setting preferred neighborhood on create volunteer modal
set preferred neighborhood on creating volunteer API
edit preferred neighborhood on edit volunteer UI
sts / map switch matches value
withCredentials = true
edit client should edit associated route delivery item

Test Plan

How did you test your changes?

Which issues does this PR resolve/work on? Closes #