docs: add Snowflake integration guide (#5977)

* docs: add Snowflake integration guide to enterprise integrations

Add documentation for connecting CrewAI agents to Snowflake via the
Snowflake-managed MCP server. Highlights Cortex Analyst, Cortex Search,
and SQL execution, and covers OAuth/PAT setup. Registers the page in
all docs.json navigation blocks.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* docs: add Snowflake integration page for ko, ar, pt-BR

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Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Co-authored-by: Iris Clawd <iris@crewai.com>