UI/API changes

• NEW: Redesigned "My Anchors" dashboard card and change request forms (Anchor Management)
• NEW: Rebuilt hardware probe registration form, replacing the legacy version
• NEW: Rebuilt software probe registration form, replacing the legacy version
• NEW: Software probe install page
• NEW: Probe overview now tells you when your probe is on hold due to a farming violation
• CHANGE: A software probe's current SSH key now appears on its Manage tab
• FIX: API error formatting harmonised across pages
• FIX: v4/v6 being dropped from historical records if not currently available in probe detail results
• TWEAK: Path analysis links out to measurement
• TWEAK: Cleaner layout on Probes overview