Add Percy to GYR and run it on 3 key flows: Full service intake, CTC intake, Hub usage

[bengolder]

Work is added to the add-percy#177084353 branch on vita-min and tracked in more detail in the GYR Pivotal Tracker.

• [x] Successfully create a single Percy snapshot using the CLI
• [x] Add Percy to one feature spec of a full flow and create a set of snapshots - added to new_joint_filers_spec.rb
• [x] Add Percy to additional feature specs - added to visit_home_page_spec.rb
• [x] Create repo script
• [x] Add setup and run instructions to README
• [x] Merge Percy code to main and get baseline snapshots for main branch.
• [x] Reverted, I think removing the JS dependencies will fix the node issue
• [x] Stop screenshots from being attempted on "normal" local/ci test runs
• [x] Merge percy improvement PR
• [x] Use Percy to review Honeycrisp update PR

[coltborg]

Getting baselines shots of main thoughts:

Create a repo script (bin/run-percy-screenshots) that runs Percy on main and then runs Percy on new branch.

[coltborg]

Wait for a review by the GYR team.

[coltborg]

GYR reviewed and merged.