[ENG-3905] feat(hubspot): Add Marketing module

[Cobalt0s]

Description

Introduces the Marketing module to the HubSpot connector.

At this stage, the Marketing module establishes the connector structure and routing needed to support Marketing APIs, while most implementation details remain shared with the existing CRM module.

Changes

• Extended ProviderInfo with a new HubSpot Marketing module definition.
• Moved and renamed internal/crm/core to internal/shared.
  • For now, the separation between CRM and Marketing is mostly structural.
  • API versioning, read output parsing, and error handling remain identical, so these utilities are now shared across HubSpot modules.
• Added a placeholder adapter in internal/marketing/adapter.go.
  • The adapter implements ListObjectMetadata, Read, Write, and Delete.
  • All methods currently return common.ErrNotImplemented.
• The HubSpot connector now initializes the Marketing adapter when the selected module is Marketing.
• Updated all public connector methods to route requests to the initialized adapter.
  • Connector methods now support routing to either the CRM or Marketing adapter.
• Updated live test helpers:
  • GetHubspotConnector was renamed to GetHubspotCRMConnector.
  • Added a new GetHubspotMarketingConnector constructor for Marketing module tests.

[linear]

ENG-3905 HubSpot Marketing Module

[Cobalt0s]

• [ENG-3906] feat(hubspot/marketing): Read campaigns #2959
• [ENG-3905] feat(hubspot): Add Marketing module #2958 👈 (View in Graphite)
• feat(hubspot): Use components #2957 : 1 other dependent PR (#2962 )
• main

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[Cobalt0s]

Hubspot won't be using modules.