Set up Solid Queue and add a fake job

[jenny-heath]

• after creating the job class and trying to run bin/jobs i got this error: PG::UndefinedTable: ERROR: relation "solid_queue_processes" does not exist (ActiveRecord::StatementInvalid)
• i ran these commands to fix it (and get the schema output in this PR):

delete queue_schema.rb
rails db:drop:queue
rails solid_queue:install
rails db:prepare

i got them from, uh, reddit. in my defense, the documentation doesn't say a thing about solid_queue:install

Update:
when anisha pulled down the branch she only had to run rails db:drop:queue and rails db:prepare to get bin/jobs to work