Official Sleekplan node for n8n to create and route feedback

Description: As an n8n user, I want an official Sleekplan node so I can create feedback posts from support channels and route new feedback to other tools without relying on manual HTTP requests. Scope: Create Feedback Post operation with fields such as title, description, category/board, tags, and requester/customer info. Surface new Sleekplan feedback into workflows so it can be routed downstream (e.g., to issue trackers, knowledge bases, or analytics). Secure Sleekplan authentication via credentials. UI field mapping, validation, and helpful defaults. Documentation and starter templates/examples. A community contributor is willing to build and hand over the node and address issues for 3 months post-merge. Problem: n8n currently lacks a native Sleekplan node, forcing users to rely on generic HTTP requests and manual handling of authentication, field mapping, pagination, and errors. This increases setup time and operational risk, and raises the barrier for non-developers to automate feedback workflows. Benefit: Reduces friction by replacing ad hoc HTTP calls with a guided, reusable integration. Enables support teams to capture feedback directly from chat/helpdesk/email workflows into Sleekplan. Streamlines routing of new feedback to other tools used for tracking, prioritization, or reporting. Delivers a consistent user experience aligned with other official n8n nodes, improving maintainability and discoverability.