feat(integrations): add support for bing-webmasters

[naorhaziz]

Summary

• Add Bing Webmasters as a new OAuth2 integration
• Uses Bing's own OAuth2 server (not Microsoft Entra ID)
• Includes provider config, docs, setup guide, and pre-built syncs placeholder

Test plan

• Verify OAuth flow works with Bing Webmasters credentials
• Verify proxy requests route correctly to https://www.bing.com/webmaster/api.svc/json
• Verify token refresh works against the separate refresh endpoint

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Use a refresh endpoint that OAuth2 refresh actually calls

For standard OAUTH2 providers, the refresh path is built from token_url in getSimpleOAuth2ClientConfig/oldAccessToken.refresh(...), while refresh_url is not used unless the provider goes through ProviderClient (and bing-webmasters is not in that list). In practice this means refreshes will still be sent to /webmasters/oauth/token, so if Bing requires /webmasters/token for refresh, connections will start failing once access tokens expire.

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[chatgpt-codex-connector]

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Reviewed commit: f751b2a419

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[chatgpt-codex-connector]

Replace unsupported refresh_token_params in OAuth2 config

bing-webmasters is configured as auth_mode: OAUTH2, but this block uses refresh_token_params, which is only used in the TWO_STEP refresh path; the OAuth2 refresh flow reads refresh_params and otherwise falls back to token_params (getFreshOAuth2Credentials in packages/shared/lib/clients/oauth2.client.ts). Since token_params here sets grant_type: authorization_code, refresh requests will be sent with the wrong grant type after token expiry, causing refresh failures in production.

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[hassan254-prog]

Thanks for the contribution, single comment otherwise looks good.

[hassan254-prog]

I would omit this here, default_scopes are mainly for scopes that are needed for connections to work properly, i.e offline_access for Oauth2 providers.

Also, remember to include a template logo with a max width or height of 44px, placed inside a 64px square container.

[naorhaziz]

Fixed! Removed default_scopes and added the logo as well.