Docs: Document .continue/configs directory support

[continue]

Summary

PR #11935 added support for .continue/configs/ as a third config directory alongside .continue/agents/ and .continue/assistants/ for loading local config profiles.

Current State

• The .continue/agents/ and .continue/assistants/ directories are documented in multiple places (e.g., docs/agents/overview.mdx, docs/guides/run-agents-locally.mdx)
• The .continue/configs/ directory is only mentioned incidentally in docs/guides/ollama-guide.mdx
• There is no dedicated documentation explaining this feature

Documentation Needed

1. Update docs/guides/configuring-models-rules-tools.mdx to include .continue/configs/ in the Organization section
2. Consider updating docs/guides/understanding-configs.mdx to mention this directory
3. Add information about what config files can be placed in this directory and how they become selectable profiles

Related PR

• feat: add .continue/configs support #11935

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Co-Authored-By: Continue noreply@continue.dev
Co-authored-by: bekahhw rhawrot@gmail.com