feat(sources): freshdesk as data source Integration

[ktan-wolf]

Implements

• Implement authentication with Freshdesk API
• Fetch data from Freshdesk and transform it to our standard format
• Add appropriate error handling and logging

Targeted Issue

source connection for Freshdesk source connection for Freshdesk #26

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Summary by mrge

Added Freshdesk as a new data source, allowing users to connect their Freshdesk accounts and sync groups, tickets, and conversations.

• New Features
  • OAuth2 authentication for Freshdesk.
  • Fetches and standardizes Freshdesk groups, tickets, and conversations.
  • Handles errors and logs integration activity.
  • Added Freshdesk icon to the frontend.

[orhanrauf]

Hi! We are currently working on a test framework that can test if implemented source integrations work for various cases. Once we have that in place, we will revisit this!