Migrate project creation form to vue

As part of a #499697 (closed) we're migrating project creation form to Vue.

All the changes will live behind the FF new_project_creation_form while it's in progress.

Plan

• First step + FF
  • Create project: Migrate a first step to vue (!178859 - merged) • Julia Miocene • 17.9
• Breadcrumbs
  • Create project: Add breadcrumbs (!179711 - merged) • Julia Miocene • 17.9
• Options validation
  • Create project: Add personal options validation (!179733 - merged) • Julia Miocene • 17.9
• Show import source icons that available
• Command line project creation
  • Create project: Add command line (!179702 - merged) • Julia Miocene • 17.9
• Navigation between first two steps
  • Create project: Add other form dummies: Blank, ... (!180221 - merged) • Julia Miocene • 17.9
  • Create project: Add navigation between first tw... (!180740 - merged) • Julia Miocene • 17.9
  • Create project: Add hash url for the first two ... (!181310 - merged) • Justin Ho Tuan Duong, Julia Miocene • 17.10
• Blank project form -> !184077 (closed) is split up
  • Create project: Add a first step validation (!185616 - merged) • Julia Miocene • 17.11
  • Create project: Add a FormFields component (!187139 - merged) • Julia Miocene • 17.11
  • Create project: Add configuration options (!192230 - merged) • Julia Miocene • 18.2
  • Create project: Add deployment target select (!188110 - merged) • Julia Miocene • 18.0
  • Create project:Add visibility selector (!190079 - merged) • Julia Miocene • 18.1
  • Create project: Add configuration options (!192230 - merged) • Julia Miocene • 18.2
  • Create project: Add configuration options (!192230 - merged) • Julia Miocene • 18.2
  • Create project: Enable submission (!197633 - merged) • Julia Miocene • 18.5
• CI/CD for external repository form
• Template list
• Template project form
• Import choice
  • Create project: Add second step to an import pr... (!181484 - merged) • Julia Miocene • 17.10
• Import from GitHub
  • Create project: Migrate GitHub auth form to Vue (!181003 - merged) • Julia Miocene • 17.10
• Import from Bitbucket Cloud - no changes needed, see #526305 (closed)
• Import from Bitbucket Server
  • Create project: Migrate an Import from Bitbucke... (!181024 - merged) • Julia Miocene • 17.10
• Import from FogBugz
  • Create project: Migrate an Import from FogBugz ... (!181100 - merged) • Julia Miocene • 17.10
• Import from Gitea
  • Create project: Migrate an Import from Gitea fo... (!181105 - merged) • Julia Miocene • 17.10
• Import from Manifest file
  • Create project: Migrate "Import from Manifest" ... (!185794 - merged) • Martin Wortschack • 17.11
• Import from URL
  • Migrate "Import from URL" to Vue (#526304 - closed) • Oiza Baiye • 18.4
  • Backend changes for migrating "Import from URL"... (#536989 - closed) • George Koltsov • 18.0
  • Add repository URL, username, password fields t... (!189024 - merged) • Justin Ho Tuan Duong • 18.0
• Import from export file
  • Create project: Migrate the Import from file fo... (!180970 - merged) • Julia Miocene • 17.10
• Add tests for app/assets/javascripts/projects/new_v2/components/project_destination_select.vue
• Review tests and add missing ones if any
• Cleanups, see a comment !187139 (comment 2442789304)
  • Create project: Fix Gitea and Fogbugz import fo... (!181873 - merged) • Julia Miocene • 17.10
• Technical Writing review
• Ping JiHo on their disclaimer checkboxes