Update MotherDuck connection guide

[johnymontana]

More comprehensive use of MotherDuck sample datasets

[Copilot]

Pull Request Overview

This PR adds comprehensive documentation for MotherDuck integration with Hypermode agents, enabling users to connect to MotherDuck's serverless analytics platform for data analysis using sample datasets.

• Adds a complete MotherDuck connection guide with step-by-step setup instructions
• Updates the documentation navigation to include the new MotherDuck guide
• Adds MotherDuck to the available connections listing with proper categorization

Reviewed Changes

Copilot reviewed 4 out of 19 changed files in this pull request and generated no comments.

File	Description
styles/config/vocabularies/general/accept.txt	Adds technical terms and dataset names used in the MotherDuck documentation
docs.json	Updates navigation structure to include the new MotherDuck connection guide
agents/connections/motherduck.mdx	Creates comprehensive documentation for MotherDuck integration with setup, examples, and best practices
agents/available-connections.mdx	Adds MotherDuck card entries to the connections overview and database category sections

Comments suppressed due to low confidence (2)

agents/connections/motherduck.mdx:98

• GPT-4.1 appears to be a non-existent model version. The current available GPT-4 models are GPT-4, GPT-4 Turbo, and GPT-4o. Consider updating to a valid model name.

- **Model**: GPT-4.1

agents/connections/motherduck.mdx:108

• This appears to be a misplaced regex pattern '(?i)m' that should likely be in the vocabulary file instead of the documentation content.

## Connecting to MotherDuck