docs: add Continue and Cline config snippets

[haocn-ops]

Summary

• add a Continue.dev setup guide with the OpenAI-compatible Free-Way base URL
• add a Cline / Roo Code setup guide with the correct /v1 path shape
• link both guides from the README agent guide list

Closes #60.

Notes

This keeps the snippets provider-neutral and uses only the local Free-Way endpoint shape from the existing docs.

[GoDiao]

Thanks for adding these guides! The endpoint shape (http://localhost:8787/v1) looks right for OpenAI-compatible clients.

Before merging, could you update the Continue.dev guide to use the current config.yaml format? Continue’s docs now mark config.json as deprecated and show schema: v1 YAML examples for OpenAI-compatible providers:
https://docs.continue.dev/customize/model-providers/top-level/openai
https://docs.continue.dev/reference/yaml-migration

A minimal Free-Way example could be:

name: Free-Way
version: 1.0.0
schema: v1
models:
  - name: Free-Way
    provider: openai
    model: llama-3.3-70b
    apiBase: http://localhost:8787/v1
    apiKey: your FREEWAY_API_KEY

Also, since this PR adds links to README.md, could you add the matching links to README.zh-CN.md as well so the two READMEs stay in sync?

[GoDiao]

Thanks again for contributing these setup guides. This is a final follow-up on the requested changes:

1. Please update the Continue guide from the deprecated config.json format to the current config.yaml / schema: v1 format.
2. Please add the matching guide links to README.zh-CN.md so the two READMEs stay in sync.

If you can push an update by September 1, 2026, we'll be happy to review it. If there is no update by then, we'll close this PR to keep the queue current; the work can always be reopened or resubmitted later.