[HubSpot] No UI to sync an existing HubSpot knowledge base

[mattsmith-fin]

Platform: HubSpot
Type: Bug / functional gap
Owning team: Knowledge

Platform: HubSpot
Type: Bug / functional gap
Owning team: Knowledge

Context
On HubSpot, customers should be able to sync their existing HubSpot knowledge-base
articles as a Fin content source — the same capability that exists for Freshdesk /
Zendesk. This option does not appear to exist in the HubSpot UI today.

Current behaviour

• No visible way to connect/sync an existing HubSpot knowledge base during or
  after Fin setup.

Expected behaviour

• HubSpot KB sync is available in the UI.
• Presented with the same treatment as Freshdesk: its own dedicated section at the
  start of the content-source step (mirrors Issue 1).
• Uses the HubSpot logo (not Zendesk).

Acceptance criteria

• A customer can sync existing HubSpot KB pages from the UI.
• Presented as its own dedicated section at the start.
• Uses the HubSpot logo.